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Simplifying 7x + -21 = 7 + -1x Reorder the terms: -21 + 7x = 7 + -1x Solving -21 + 7x = 7 + -1x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add 'x' to each side of the equation. -21 + 7x + x = 7 + -1x + x Combine like terms: 7x + x = 8x -21 + 8x = 7 + -1x + x Combine like terms: -1x + x = 0 -21 + 8x = 7 + 0 -21 + 8x = 7 Add '21' to each side of the equation. -21 + 21 + 8x = 7 + 21 Combine like terms: -21 + 21 = 0 0 + 8x = 7 + 21 8x = 7 + 21 Combine like terms: 7 + 21 = 28 8x = 28 Divide each side by '8'. x = 3.5 Simplifying x = 3.5
| 20x=12x+112 | | X^2+12=7 | | (3x+7)=-15 | | -9-(7x)=-5 | | (4/5)n-7=-4 | | 1.28-8=0.32 | | 4x^2-36x+80=208 | | 8b+2=3(5b-4) | | 6d-3d+2d=18 | | ax+5=c-5 | | (R+5)=12 | | 6x-3+6x-8=1-4x | | .5x+2=.8x-.3x | | 10m^2-50m^2-40= | | 4x+2(x-13)=10 | | 21/3+3n=4/5n+15 | | 5x^(7/4)-55=0 | | 4y+y+1=7(4-1) | | 1-2x+4=-4x+5 | | 72+4-12d=36 | | 4x-12=4x+4 | | 3+(-15)+-2= | | 1.4(b+3)=5.32 | | 16x-(6x-9)=69 | | 10m^2-31m+15=0 | | 4y-3x=-4 | | 5-2x=-4x+5 | | b/3+1/4=13 | | -3(2x+9)=6x+9 | | .3h-4(.6h-3)=.6h-6 | | 9/8+5/6= | | p/0.3=1.5 |