12x - 4 = 12
12x = 16 <--- by adding 4 to both sides
x = 4/3 <--- by dividing both sides by 12
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If the x=4, then its equivelent to 12 + 4, which equals 16.
X equals -4 because if you pluged in 12 divided by -3 it equals -4.
x2+4=12 x=4 or another way to ask that is 2x+4=12 x=4 because then you do 2 times 4 then + 4 it equals to 12
4 x 2 + 4 = 12 x = 4
x = -4 and y = 4