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Simplifying 7x + (5x + 18) = 90 Reorder the terms: 7x + (18 + 5x) = 90 Remove parenthesis around (18 + 5x) 7x + 18 + 5x = 90 Reorder the terms: 18 + 7x + 5x = 90 Combine like terms: 7x + 5x = 12x 18 + 12x = 90 Solving 18 + 12x = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-18' to each side of the equation. 18 + -18 + 12x = 90 + -18 Combine like terms: 18 + -18 = 0 0 + 12x = 90 + -18 12x = 90 + -18 Combine like terms: 90 + -18 = 72 12x = 72 Divide each side by '12'. x = 6 Simplifying x = 6
| 1.4x=4 | | 17=5d-8 | | 0.2x-1=-0.4 | | 3r^5+5r= | | 0.30x+.005(8-x)=0.10(24) | | 4x+4=2x-24 | | 162c^2=c+(c-5) | | -2-5x=-4x+0 | | m^2-18m+81=0 | | 0.333333x+4=x-2 | | 80=-16x^2+160x-256 | | 3r^5+5= | | 5+13+4f-f+1= | | -6(2n-3)=6-8n | | 3(x+4)=(x-12)+4x | | 0.3333x+4=x-2 | | x+80+x+120=180 | | 0.333x+4=x-2 | | 2x/10+9=5 | | 162=c+(c-5) | | 5-(3x-2)+7=15 | | p=3w+4l | | 5v^2+30v-80= | | -x^2+2x+6= | | 18x+6=2(9x+3) | | 57x-42x+18=62 | | 10x=8y+40 | | -3(n+5)=25+7n | | 5-2x=2x-8x+40 | | 5a-2-4a=o | | 32+8p=-4(3p+3)+4 | | b+3/2b+(2b-90)+90+(b+4)=540 |