dmezzullo

Solve for x: the quantity of x plus 20 over 2 = 3x
x = 10
x = 4
x = −14
x = −17

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dmezzullo

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@sue101 @rduncan16 @mikala1 @hero @Ledah @SUpAmArIo @jazy @jhonyy9

sue101

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ur so needy danny :P

pratu043

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(x + 20)/2 = 3x
x + 20 = 3x * 2 = 6x
x - 6x = -20
-5x = -20
x = -20/-5
= 4
x = 4

jazy

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\[\frac{ x + 20 }{ 2 } = 3x\]Multiply both sides by 2.\[\frac{ x + 20 }{ 2 }(2) = 3x(2)\]\[x + 20 = 6x\]Combine like terms and solve for x.

jhonyy9

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cross multiplie

mikala1

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x + 20/2 = 3x
multiple both sides by 2 to get rid of the 2
2(x+20/2) = 3x(2)
the 2s cancel each other out on the left side
x+20=6x
you want to get the x's on the same side
so subtract x from each side
20=5x
divide both sides by 5 to get x on its own
20/5 = 5x/5
4=x

jhonyy9

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what will get than ?

dmezzullo

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cse im so stupid @sue101

mikala1

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opp i put the answer on accsident

dmezzullo

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4x

dmezzullo

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cse 20/5=4

mikala1

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yes thats right

rduncan16

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4

jazy

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Yes, x = 4.