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Simplifying 5 + -2(x + -1) = 21 Reorder the terms: 5 + -2(-1 + x) = 21 5 + (-1 * -2 + x * -2) = 21 5 + (2 + -2x) = 21 Combine like terms: 5 + 2 = 7 7 + -2x = 21 Solving 7 + -2x = 21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -2x = 21 + -7 Combine like terms: 7 + -7 = 0 0 + -2x = 21 + -7 -2x = 21 + -7 Combine like terms: 21 + -7 = 14 -2x = 14 Divide each side by '-2'. x = -7 Simplifying x = -7
| 7x=840 | | -x/9=8 | | 7x+8x-20=60-5x | | 36x^2-476x-2461=0 | | 5x+3=5(5)+3 | | (7x)+8=(3x)+24 | | 48x-60=18 | | 180=x+18x | | 32-8x=3x-45 | | 3(12x+5)-10= | | -14+6+7-2=1+5 | | 48x+60=18 | | 2x+40=10x | | z=20x-5x | | 7y-(6y-9)=-16 | | 9a-4+n=16 | | 4(3x-1)+5x+3(7x-4)=-130 | | 6ab+3ab-7ab= | | 42x^2+17x=15 | | x+x+50+3(x-150)=1000 | | -7-3+2=-8-8 | | 4k(2c-a+3m)= | | b+(2b-8)+(2b-8)=74 | | 12(4x-5)=18 | | -2x^2-6x+5=0 | | 8(x)-11=5(x)+11 | | -8-x=1x-4x | | 5x+x^2+2x+5-4-x^2= | | -130=4(3x-1)+5x+3(7x-4) | | 6x+19+5=3x | | 2x+8-6=4 | | -28=6p-70 |