Answer: a= 6 ; b= 2
Step-by-step explanation:
Given
4a + 7b = 38---- equation 1
9a + 7b = 68-----equation 2
we eliminate b by subtracting equation i from 2 which gives us
5a =30
a = 30/5= 6
Puting the value of a -= 6 in equation 1
4a+7b= 38
= 4 x6 + 7b= 38
24+ 7b= 38
7b= 38-24
7b= 14
b= 14/7
b= 2
a= 6 ; b= 2
