Question

help please
5x - 4y = 3
2x+ 7y = -10

Answer 1

Okay, so let us isolate x.
2x = -10 - 7y
x = -5 - 7/2y
Now we can use x in the first equation.
5(-5-7/2y) - 4y = 3
-25 - 35/2y - 4y = 3
-25 - 43/2y = 3
-43/2y = 28
-43y = 56
y = -56/43
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