anonymous
  • anonymous
use the elimination method to solve the system of equations. a+7b=7 a+2b=-3
Mathematics
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
katieb
  • katieb
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
hartnn
  • hartnn
subtract the 2 equations, what u get ?
anonymous
  • anonymous
I am sorry don't understand
hartnn
  • hartnn
let me give you an example on how to subtract equations, let the 2 equation be say, 2x+3y =7 2x-3y =2 now if i subtract the 1st equation from 2nd equation, i get (2x-3y) - (2x+3y) = 2-7 so, 2x-2x-3y-3y=-5 0-6y=-5 so, y = 5/6 in same manner, you try for your question of a+7b=7 a+2b=-3

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

anonymous
  • anonymous
b=5/4?
hartnn
  • hartnn
very close,but its 7b-2b = 7-(-3) can you proceed ?
anonymous
  • anonymous
9b=4
hartnn
  • hartnn
7-2 = 5 7- (-3) = 7+3 =10 -_-
anonymous
  • anonymous
so b=5/10?
hartnn
  • hartnn
7b-2b = 7-(-3) 5b = 10 b=10/5 = 2 got this ?
anonymous
  • anonymous
still confused
hartnn
  • hartnn
on which step ?
anonymous
  • anonymous
7-(-3) since it has a minus sign in front i believed it was to be subtracted not added.
hartnn
  • hartnn
- * - = + so, 7 - (-3) became 7+3
anonymous
  • anonymous
ok now i understand
anonymous
  • anonymous
so the final answer would be 2
hartnn
  • hartnn
b=2 you still need to find 'a' put b=2 in any 1 of the original equation to get a
anonymous
  • anonymous
multiply the first equation by a -1. Doing this will cancel out the a's. You can then solve for b. Once you have solved b, substitute that in for b in either of the original equations and you will solve a. You can then check your answer by subbing in known variables in either of the original equations and if they equal, your answers are correct :)

Looking for something else?

Not the answer you are looking for? Search for more explanations.