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Simplifying 2[n + 4] + -1 = 15 Reorder the terms: 2[4 + n] + -1 = 15 [4 * 2 + n * 2] + -1 = 15 [8 + 2n] + -1 = 15 Reorder the terms: 8 + -1 + 2n = 15 Combine like terms: 8 + -1 = 7 7 + 2n = 15 Solving 7 + 2n = 15 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 2n = 15 + -7 Combine like terms: 7 + -7 = 0 0 + 2n = 15 + -7 2n = 15 + -7 Combine like terms: 15 + -7 = 8 2n = 8 Divide each side by '2'. n = 4 Simplifying n = 4
| 3[5-y]=-12 | | -2r+21=-7(8r-2)+7 | | 4+3i+3=4i+6 | | -9k-36=72 | | 1.5x+2y=1500 | | 2m+m-8=1 | | -2=3(x+6) | | 3x+33=5(1-5x) | | x^2-y^2=12.5 | | -7[3x-1]+8= | | 6[-2y+4]-5y= | | a+7=3+7 | | 36x^3-176x^2+128x=0 | | y+9=4(x-2) | | 36a^2-66a-210=0 | | 6r^2-12r-48=0 | | y+4=2(x-9) | | 28n^3+284n^2+40n=0 | | y-9=2x+4 | | 25p^2-105p+90=0 | | 10k^2-76k-126=0 | | x^2+3*x-5*(x-4)=2x^2+2*x | | x-11/2=-5 | | 2x^2-5x-4.5=0 | | 2y+3=4-7y | | -2/5(10x-15)=30 | | 6x(-12)=-72 | | 4e+7e-5= | | 1*7/8 | | x=ln[(x^2+1)2x+1] | | x=ln[(x^2+1)(2x+1)] | | f(x)=ln[(x^2+1)(2x+1)] |