SOLUTION: Solve for x,y by substitution 3x-4y=10 x=-y+1

Question 962338: Solve for x,y by substitution
3x-4y=10
x=-y+1
Answer by rothauserc(4718) (Show Source): You can put this solution on YOUR website!
3x - 4y = 10
x = -y + 1
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substitute for x in first equation using second equation
3*(-y + 1) -4y = 10
-3y +3 -4y = 10
-7y +3 = 10
-7y = 7
y = -1
x = -(-1) + 1
x = 2
solution is x = 2 and y = -1
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check answer by substituting for x and y in first euation
(3*2) - 4*(-1) = 10
6 +4 = 10
10 = 10
our answer checks

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