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Simplifying 12 + -3(x + 7) = 15 Reorder the terms: 12 + -3(7 + x) = 15 12 + (7 * -3 + x * -3) = 15 12 + (-21 + -3x) = 15 Combine like terms: 12 + -21 = -9 -9 + -3x = 15 Solving -9 + -3x = 15 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + -3x = 15 + 9 Combine like terms: -9 + 9 = 0 0 + -3x = 15 + 9 -3x = 15 + 9 Combine like terms: 15 + 9 = 24 -3x = 24 Divide each side by '-3'. x = -8 Simplifying x = -8
| 13=9m+5 | | -4x+13+5x=4+x+9 | | 2.20+x=3.50 | | 25(1-x)=125 | | 15x-4=27x+4 | | 5x+7-4x=4 | | (3x/2)-7=(x/4)-2 | | 21/5+x=31/2 | | 0.08x+0.09(x+2.000)=860 | | -7(4+5x)=392 | | x+3y=z | | 2+x=-20 | | 7n+3=-9+5n | | 4(3-6x)=36 | | -24=6(7x+3) | | 23/6x | | cot(sin)=cos | | .9x+11.5=24.1 | | 22/3+3n=4/5+12 | | 17+5=5+n | | 0.10x+0.12(x+1500)=642 | | 8x+5x-3=23 | | x(x)+5x=9x+12 | | 28+21x=42+14x | | 4(2x-3)=5(x-2) | | -15-10f=-10f-15 | | 35-8x=47 | | 8(x-1)+3(x+4)=48 | | 7x+4=5x-6x+10 | | -1/2*5 | | 8(4.6)-6=2(4.6+11) | | 8(4.6)-6=2(4.7+11) |