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Solve by Substitution
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Solve by Substitution

Solve by Substitution-example-1
User Jacksonkr
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2 Answers

4 votes
x= 2 and y= -3
Just substitute the value of y into the first equation add like terms and solve
User Peter Quiring
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3.4k points
3 votes

Answer:


-9x-10y=12 \ -----(1)\\\\-3x+3=y \ ------(2)\\\\substitute \ y \ in \ (1)\\\\-9x -10(-3x+3) =12\\\\-9x+30x-30=12\\\\21x= 12+30\\21x=42\\x=2\\\\\\substitute \ x \ in \ (2)\\-3\cdot 2+3=y\\-6+3=y\\y=-3

x= 2, y = -3

User Wallace Howery
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