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Simplifying -3 + 3(7n + -4) = 90 Reorder the terms: -3 + 3(-4 + 7n) = 90 -3 + (-4 * 3 + 7n * 3) = 90 -3 + (-12 + 21n) = 90 Combine like terms: -3 + -12 = -15 -15 + 21n = 90 Solving -15 + 21n = 90 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '15' to each side of the equation. -15 + 15 + 21n = 90 + 15 Combine like terms: -15 + 15 = 0 0 + 21n = 90 + 15 21n = 90 + 15 Combine like terms: 90 + 15 = 105 21n = 105 Divide each side by '21'. n = 5 Simplifying n = 5
| 3(2+k)-5(1+k)=-63 | | 7w+3y=21 | | 6(b-10)-10b= | | -3(9x-7)= | | 2w^3+16=0 | | 2.9x-59=1.5x+4 | | -5n+18+21n= | | 3x-4+4=4(2x-1) | | -8+23=-15 | | .25x^2+12=0 | | -3(a+4)= | | -.50(b+2)+3b=-1 | | [b+2]=2b | | -3(7n-10)= | | 6+6x=7x | | 6x+y+1= | | .375d-.25=.25d+1.25 | | -2(1-5n)= | | -10(x+3)= | | -11+3x=22 | | 4/3=2/5j | | -6(1+4k)= | | -15=7x+48 | | 4.6=5x+4.1 | | 5x+6=6x-5 | | 2y^3+2=0 | | 2t=2r | | x+5x+4=3(x-1) | | -8(2-7p)= | | 13x-39=11x-37 | | -4.2=9 | | 0.5x=4.15 |