Question

Solving Systems of Equations by Elimination

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10x + 9y= -17
7x + 10y= 14

Answer 1

y=7 and x=-8

Explanation:

Isolate x in the first equation:

10x=-17-9y

x=(-17-9y)/10

Substitute into the second equation:

7*((-17-9y)/`10)+10y=14

-119/10+37y/10=14

-119+37y=140

37y=259

y=7

Putting this into the first equation, we get that x=-8