Need help with math.,

Question

4x+3y=8.

3x+4y=-10

Answer 1

Solve it by elimination method of simultaneous equation:

Multiply the first equation by 3 and multiply the second equation by 4

You'll get:

12x + 9y = 24

12x + 16y = -40

Subtract the first equation by the second equation:

(12x - 12x) + (16y - 9y) = (-40 - 24)

7y = -64

y = -64/7

Substitute y = -64/7 into any given equation and solve for x, let's say:

4x + 3(-64/7) = 8

x = (8 + 192/7)/4 = 2 + 48/7 = 62/7