If: 4x+(-12) = 8 then 4x = 20 and x = 5
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x=5
x=3
Only if 4 dollars plus 4 dollars equals 8 dollars.And if you had another 4x, you'd have a dozen-x.
Simplify 4x + 3 = 2x + 8 2x = 5 x =2½
2y = 4x - 16 5y = 4x + 8 Subtract the first equation from the second: 3y = 24 so that y = 8 Substitute this into the first equation: 16 = 4x - 16 ie 32 = 4x so that x = 8 So the solution is (8, 8)