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Simplifying (3x + -1) + (4x) = 90 Reorder the terms: (-1 + 3x) + (4x) = 90 Remove parenthesis around (-1 + 3x) -1 + 3x + (4x) = 90 Combine like terms: 3x + (4x) = 7x -1 + 7x = 90 Solving -1 + 7x = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + 7x = 90 + 1 Combine like terms: -1 + 1 = 0 0 + 7x = 90 + 1 7x = 90 + 1 Combine like terms: 90 + 1 = 91 7x = 91 Divide each side by '7'. x = 13 Simplifying x = 13
| x^2-10=x^2-98 | | (n*-6)-4=-24+-2n | | 3x-1+4x=90 | | 5-b=22 | | -3x+2x=21 | | .05(21-m)+.10(m)=1.65 | | -15-(-18)=x/2 | | 5x+18=6x | | -4(4x-7)= | | 2(3c-1)-5=2c+9 | | 2x+7=8x-10 | | -14n+17=-13n-3 | | 4t-7=5(t+5) | | -3y-11=6y+16 | | a+0.04a=1.04a | | 8(10-4a)+15=-3(a+7) | | 12u-91u=5u | | 32+4y-3=16y-13-5y | | 3*16t^2+240t= | | -17-(-37)=x/5 | | 32+4y-3=16y-14-5y | | a+0.04a=0.04a | | 2/3x1/11 | | 3(x-2)+4=5x-2 | | 6(a+3)+(-a-5)=-16 | | 6x+22=360 | | 2x+8y+7z=0 | | 6x+22=90 | | 10u-84-3u= | | x+22+2x=-17-2x-21 | | .05(d+2)+.10(d)+.25(d+2+3)=3.35 | | 4*4-2=y+5 |