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4x + y = 9 so that y = 9 - 4x 7x - 8y = 6 7x - 8*(9-4x) = 6 7x - 72 + 32x = 6 39x = 78 x = 2 Then y = 9 - 4x = 9-4*2 = 9-8 = 1
The answer to the math problem of 5x plus 7x-4x 6 is -12.
7x + 6 - 4x = 5 + 2x + 7 subtract 6 from both sides and combine the 5 and 7 on the right: 7x - 4x = 2x + 6 subtract 2x from both sides and combine the 7x and -4x on the left: x = 6
(2, 1)
You solve it like this: 7x=4x-6 (subtract 4x from both sides) 3x=-6 (divide both sides by 3) x=-2