{33а+42b=10 {9a+14b=4

Question

{33а+42b=10
{9a+14b=4

Answer 1

1) 9a+14b=4
a=4-14b/9

2)33(4-14b/9)=10
132-84b/9=10
90=132-84b
b=42/84
b=0,5

3) a=4-14*0,5/9=-1/3