four
22 - 2 = 20 = 5 x 4
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8x-7 plus 2x equals 6 plus 5x plus 2?
Here is the work for that problem: 5x+ 2=12 5x= 12-2 5x=10 x= 2
3x + 2 + 2x = 7; 3x + 2x = 5x, so 5x + 2 = 7; 7-2=5, so 5x=5. 5x divided by 5 and 5 divided by 5 equals 1, so x equals 1.
(3, 2)
(4, -2)