Masonpizza811id
Answered

Solve the following systems by elimination: 7a – b = -1
7a + 3b = 3

Sagot :

Mlcparra16id
We subtract the second equation from the first:
7a - b = -1
-7a - 3b = -3
    -4b = -4
      b = 1

7a - b = -1
7a -1 = -1
7a = 0
a = 0