Question

Solve the system of linear equations by linear combination:

Answer 1

$\left \{ {{4x + 3y = 5 } \atop {2x - 3y = 7}} \right.$

6x = 12 
x = 2

4*2 + 3y = 5 -> 8 + 3y = 5 -> 3y = 5 - 8 -> 3y = -3   -> y = -1

2*2 - 3y = 7 -> 4 - 3y = 7  ->  -3y = 7-4  =  -3y = 3  -> y = -1


x = 2
y = -1