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Simplifying (4x + 7) + -1(12 + -9x) = 86 Reorder the terms: (7 + 4x) + -1(12 + -9x) = 86 Remove parenthesis around (7 + 4x) 7 + 4x + -1(12 + -9x) = 86 7 + 4x + (12 * -1 + -9x * -1) = 86 7 + 4x + (-12 + 9x) = 86 Reorder the terms: 7 + -12 + 4x + 9x = 86 Combine like terms: 7 + -12 = -5 -5 + 4x + 9x = 86 Combine like terms: 4x + 9x = 13x -5 + 13x = 86 Solving -5 + 13x = 86 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + 13x = 86 + 5 Combine like terms: -5 + 5 = 0 0 + 13x = 86 + 5 13x = 86 + 5 Combine like terms: 86 + 5 = 91 13x = 91 Divide each side by '13'. x = 7 Simplifying x = 7
| 5+9x=23x | | y+4x=9+3 | | N/53 | | 4(-7-10)=240 | | 2(b+1)-7b=4b+2 | | (2X-1)+(X-3)=X^2-14 | | Y=1.27+0.062x | | 3(x-6)+9=3x-9 | | [20+(5*2)-15]= | | Y=0.062x+1.27 | | y=9-4x(-2) | | -3=2x^2+5x-9 | | 3-5z=-4-5z | | -10+6x(2)=28x | | 37/x=11/23 | | 9/26=x/31 | | 47/9=x/15 | | 7x-5/9 | | 31/13=51/x | | 7-x/25x/3-6 | | 35+2=14 | | 14/23=27/x | | 13/x=52/64 | | x=7x+5-5x | | x/27=49/51 | | 5xy+3x=10 | | -2x(3x-1)+x=14-x | | 14/3=x/52 | | x/68=72/90 | | 1/2^7 | | 13/15=5/x | | x/50=0.4/125 |