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5x +12 = -78 -10x +10x +10x 15x +12 = -78 -12 -12 15x = -66 /15 /15 x = 4.4
5x + 2 = x + 12 5x - x = 12 - 2 4x = 10 x = 10/4 x = 5/2 or 2.5
If that's -144, the answer is (5x + 12)(5x - 12)
x is 12
Expressed algebraically, this is equal to 5x - 12.
12
2X2+5x-12 4+5x-12 -8+5x 5x-8
12
Here is the work for that problem: 5x+ 2=12 5x= 12-2 5x=10 x= 2
5x + 3 = -12 5x =-12-3 =-15 x = -3
Let x equal the number. Then:2x + 12 = 4/5x2x - 4/5x = -126/5x = -12x = -12 * 5/6x = -10
(3)(2)(2)5x=60 12(5x)=60 12(5x)/12=60/12 5x=5 x=1