Question

Resolver os sistemas

A) {3x+y=5
2x-3y=-4

B) {x+y=3
2x+3y=8

C) {2x+3y=3
3x+5y=2

Answer 1

a) y = 5-3x

2x - 3.5 -3x = 4

2x -15 -3x = 4

-x = 4+15

(-x = 19) * (-1) = x = -19

3.-19+ y =5

-57 + y = 5

y = 62