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Simplifying 90 = 2x + (x + -9) Reorder the terms: 90 = 2x + (-9 + x) Remove parenthesis around (-9 + x) 90 = 2x + -9 + x Reorder the terms: 90 = -9 + 2x + x Combine like terms: 2x + x = 3x 90 = -9 + 3x Solving 90 = -9 + 3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3x' to each side of the equation. 90 + -3x = -9 + 3x + -3x Combine like terms: 3x + -3x = 0 90 + -3x = -9 + 0 90 + -3x = -9 Add '-90' to each side of the equation. 90 + -90 + -3x = -9 + -90 Combine like terms: 90 + -90 = 0 0 + -3x = -9 + -90 -3x = -9 + -90 Combine like terms: -9 + -90 = -99 -3x = -99 Divide each side by '-3'. x = 33 Simplifying x = 33
| 11=9-k | | -7+(-z)+12= | | 4x^2+21=0 | | 2w^2+60w=36000 | | n-1=-1+n | | 8x+4(4-x)=2x-16 | | 11x-49-13x=33 | | 21x+12=x+3 | | 235=76+(x-31) | | 7x(-3x)-5-8=4+10-7x+5 | | 2(-4-2m)= | | -3x=7+4x | | 140=-10b | | 4z-7= | | 13+5n+(-21)= | | 5p+2=4p_1 | | 10x=3y+17 | | -1/2r+17+17/90=33/10r+4+1/10 | | x+.25*x=349 | | tan(135+120)= | | 90=(2x+1)+(x+20) | | 7x+4=16-7x+8x | | 8t-4(-2.5+6t)=-4 | | j/19-2=15 | | 0.02x=1.4 | | 3(7+2C)= | | x+25.4=44.8 | | 6x+2+3x+5= | | 24-10x=25+4x | | 8+3n+(-12)= | | -2q+86=1/2(2q+76) | | -4y+6=34 |