anonymous
  • anonymous
HELP ME Solve 4(2x − 1) − 3 = 9(x − 4). −29 32 13 29
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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UsukiDoll
  • UsukiDoll
distribute 4(2x − 1) and 9(x − 4). first
anonymous
  • anonymous
okay 6x-4*1???? and 9x*9*4
anonymous
  • anonymous
i meant - in the middle of the second one

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More answers

UsukiDoll
  • UsukiDoll
o-o distribute means to multiply what is 4 times 2x and what is 4 x 1 ?
anonymous
  • anonymous
8x and 4
UsukiDoll
  • UsukiDoll
and 4 times 1 similarly what is 9 times x and 9 x 4 9(x − 4)
UsukiDoll
  • UsukiDoll
ack ignore first sentence...
anonymous
  • anonymous
lol 9x and 36
UsukiDoll
  • UsukiDoll
4(2x − 1) − 3 = 9(x − 4). 8x-4-3=9x-36
UsukiDoll
  • UsukiDoll
so we need to clean this up a bit ... what is -4-3?
anonymous
  • anonymous
-7
UsukiDoll
  • UsukiDoll
yay 8x-4-3=9x-36 8x-7=9x-36 now I need to have all x's to the left... what do we need to do next?
anonymous
  • anonymous
add 36??
UsukiDoll
  • UsukiDoll
umm yeah but we're not there yet... let's have all x's to the left first .
UsukiDoll
  • UsukiDoll
which terms have x in them?
UsukiDoll
  • UsukiDoll
8x-7=9x-36
anonymous
  • anonymous
8x and 9x
UsukiDoll
  • UsukiDoll
yes... and we need all variables (that is the letters) to the left since 8x is already on the left... what do we need to do to have 9x on the left?
anonymous
  • anonymous
add?
UsukiDoll
  • UsukiDoll
ummm no we need to get rid of the 9x on the right so we do what to both sides?
anonymous
  • anonymous
divviidddee?? No, subtracct.. No, divide.
UsukiDoll
  • UsukiDoll
we don't do division...we do subtraction
UsukiDoll
  • UsukiDoll
so we subtract 9x on both sides 8x-7-9x=9x-9x-36 the 9x on the right should go to 0 then we rewrite this
UsukiDoll
  • UsukiDoll
8x-9x-7=-36
UsukiDoll
  • UsukiDoll
what is 8x-9x ?
anonymous
  • anonymous
-1x
mathstudent55
  • mathstudent55
@Marianakay456 On the right side you have 9x - 36 Think of it as + 9x - 36 The 9x is being added to the right side, the 36 is being subtracted from the right side. Since you want to get rid of the +9x from the right side, you subtract 9x from both sides.
UsukiDoll
  • UsukiDoll
yeah -x-7=-36 now I need all numbers to go on the right... what do we need to do to the 7?
anonymous
  • anonymous
add?
UsukiDoll
  • UsukiDoll
yes we add 7 to both sides -x-7+7=-36+7 -x = -36+7
UsukiDoll
  • UsukiDoll
what is -36+7 ?
anonymous
  • anonymous
-29
UsukiDoll
  • UsukiDoll
-x = -29 yes... there is one more step though....what is it?
anonymous
  • anonymous
do we make it positive? lol idk
UsukiDoll
  • UsukiDoll
yeah we make it positive by dividing ???????? because I want x = ? to be my final answer
anonymous
  • anonymous
-29?
anonymous
  • anonymous
so the answer is +29 or just 29
UsukiDoll
  • UsukiDoll
-x = -29 how to make this positive.... we use division .. divide by ??? to have x = ?
anonymous
  • anonymous
is D correct? 29 or +29?
mathstudent55
  • mathstudent55
-x means -1 * x divide both sides by ...
anonymous
  • anonymous
-1
UsukiDoll
  • UsukiDoll
please understand the last step before choosing the answer -x=-29 there is a step missing.
UsukiDoll
  • UsukiDoll
division is required... divide ____________ on both sides
anonymous
  • anonymous
we need to divide by -1
UsukiDoll
  • UsukiDoll
yes on both sides
anonymous
  • anonymous
OKK. we end up with DUNDUNDUN my answer, D
UsukiDoll
  • UsukiDoll
yeah
anonymous
  • anonymous
thanks

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