0
1)3x-y=7
2)2x-y=8
2) * (-1) so it becomes
1)3x-y=7
2)-2x+y=-8
1)+ 2) so it becomes
3x=(-2x)-y+y=7+(-8)
x= -15 that meens y=8+2x=8-30=-22
Improved Answer:
3x-y = 7
2x+y = 8
Add both equations together:
5x = 15
x = 3
Substitute the value of x into the equations to find the value of y:
x = 3 and y = 2
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Continue Learning about Math & Arithmetic
If x equals 4 then 2x plus 7 equals?
If x=4 then 2x+7 =
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What is -7 plus 2x equals x plus 8?
-7 +2x = x + 8 2x - x = 7 + 8 x = 15
Is 2x plus 7 equals 8 equivalent to 2x equals 1?
no x would be 0.5 because two times 0.5 is 1 ( 2x ) and then add 7 equals 8 ( plus seven equals 8 )
Solve 2x plus 3 equals 7?
2x+3 = 7 2x = 7-3 2x = 4 x = 2
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