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Simplifying 5x + -7(x + 3) = 2x + -21 Reorder the terms: 5x + -7(3 + x) = 2x + -21 5x + (3 * -7 + x * -7) = 2x + -21 5x + (-21 + -7x) = 2x + -21 Reorder the terms: -21 + 5x + -7x = 2x + -21 Combine like terms: 5x + -7x = -2x -21 + -2x = 2x + -21 Reorder the terms: -21 + -2x = -21 + 2x Add '21' to each side of the equation. -21 + 21 + -2x = -21 + 21 + 2x Combine like terms: -21 + 21 = 0 0 + -2x = -21 + 21 + 2x -2x = -21 + 21 + 2x Combine like terms: -21 + 21 = 0 -2x = 0 + 2x -2x = 2x Solving -2x = 2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2x' to each side of the equation. -2x + -2x = 2x + -2x Combine like terms: -2x + -2x = -4x -4x = 2x + -2x Combine like terms: 2x + -2x = 0 -4x = 0 Divide each side by '-4'. x = 0 Simplifying x = 0
| 5x-8x=2x+40 | | 3a-12b-21c= | | 5/-14(-14) | | 5x-(x+3)=2x-21 | | -5n(5n+8)=5 | | (2y+3)(y+5)=-2(2y+3) | | 12-(-8x)+5x-(-12)= | | 12/30=10/x | | 13x^2-73x=380 | | 0/-12(-12) | | 16x^2+32x=73 | | 6+m=10 | | 3.1x+4.6=10.7 | | 4(2+x)=1+4(x-1) | | 25=-5x+15 | | -4(5x-y)= | | 2(y^2-45)=-11y | | (a-11)(a+5)= | | 0.6(a+b-9)= | | -0.3(a+b-8)= | | 5x+9=x-35 | | (3w+4)(2w-1)= | | 984=600+96t | | F(x)=4x^2+6x+4 | | 6x+2(x-5)=62 | | 3/26×8= | | -6x+2(-x-3)=46 | | 2x-y+2x+y=180 | | -3z^2+104=104 | | 6.0(a+b-9)= | | 6x-4(2x+3)=-32 | | 6x-4(2x+31)=-32 |