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Simplifying (7 + 3x) + (2x + 13) = 90 Remove parenthesis around (7 + 3x) 7 + 3x + (2x + 13) = 90 Reorder the terms: 7 + 3x + (13 + 2x) = 90 Remove parenthesis around (13 + 2x) 7 + 3x + 13 + 2x = 90 Reorder the terms: 7 + 13 + 3x + 2x = 90 Combine like terms: 7 + 13 = 20 20 + 3x + 2x = 90 Combine like terms: 3x + 2x = 5x 20 + 5x = 90 Solving 20 + 5x = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + 5x = 90 + -20 Combine like terms: 20 + -20 = 0 0 + 5x = 90 + -20 5x = 90 + -20 Combine like terms: 90 + -20 = 70 5x = 70 Divide each side by '5'. x = 14 Simplifying x = 14
| 1/4x13/5 | | 7(-2x-3)=3(-3x-2) | | 4x^2+x=-11x | | (1/9)(z-1)=(-1/5)(z+6) | | (x^3)/(10)-12x=(x^2)/(5) | | 22x8/11 | | 245+115=255+130 | | 6+7x=6x+6 | | 5=2-3x | | 4+4x/7+4-x/5=9/35 | | -4/3*12+4 | | 8v^2+14v-15= | | 23g=90 | | (x^3/10)-12x=(x^2/5) | | -4/3*9+4 | | 3-4n+2n=47-88 | | -x=5+4 | | =7x^3-5x^2-63x+45 | | -4/3*6+4 | | 24+8m=8-5(4-4m) | | 5x+2=14+4x | | -4/3*4+4 | | -6(2p+3)-10=2(5p+8) | | 2u-3=-9 | | -8(-2)+4+20(-2)=-6(-2)-14 | | -4/3*5+4 | | t^3=8 | | -70=42-2t/3 | | 2(x+15)=9x+2(x^2-15) | | -4/3*3+4 | | -3-4m-4m=-11 | | 17.6=5s |