3x + 2x - 20 = 180
5x - 20 = 180
Add 20 to both sides: 5x = 200
Divide both sides by 5: x = 40
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x+10+3x+14=1804x+24=1804x=180-244x=156x=156\4x=39
Combining like terms, 16x + 20 = 180 or 16x = 160 so that x = 10
15x minus 8=minus 180 3x+8=24
3x + 2 = 3x + 6 This is not possible.
(2, -1)