Question 63610
1st: 8x + 9 = -5y
2nd: -3x + 3y = -21
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Divide thru 2nd by 3 to get:
-x+y=-7
Solve for y to get:
y=x-7
Substitute in 1st to get:
8x+9=-5(x-7)
8x+9=-5x+35
13x=26
x=2
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Substitute into y=x-7 to solve for y, as follows:
y=2-7=-5
Solution: (2,-5)
Cheers,
Stan H.