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Simplifying 3x + (x + 6) = 90 Reorder the terms: 3x + (6 + x) = 90 Remove parenthesis around (6 + x) 3x + 6 + x = 90 Reorder the terms: 6 + 3x + x = 90 Combine like terms: 3x + x = 4x 6 + 4x = 90 Solving 6 + 4x = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + 4x = 90 + -6 Combine like terms: 6 + -6 = 0 0 + 4x = 90 + -6 4x = 90 + -6 Combine like terms: 90 + -6 = 84 4x = 84 Divide each side by '4'. x = 21 Simplifying x = 21
| 5x^4=5 | | U-8=4 | | -8x-4(6-5x)=49-(5-3x) | | 0.4=60 | | 4y-15=90 | | 3b*3-b-3=81 | | 2x-9=x+5-11 | | 90/100*x=148 | | 6/8=10/x | | 0=4p+4 | | x+(x+18)+(x-13)=180 | | V^5/4=243 | | -55+-18=53+7x | | 9x^2-7x-11=24 | | 12-(5+x)=0 | | 0=2p-7 | | 3+4x=-7-1x | | 7x-40=x+2 | | 5x+13-3x=8+4x-7 | | 12z+1+6z-1=90 | | 13x+23=2 | | x^2-3x+168=0 | | -3/4×12 | | f(x)=x^3-2x^2-25x+50 | | 1.1=2.7c+.22p | | 1/4=-4/1x-10 | | 3x-8/2=849.5 | | 0=x^3-2x^2-25x+50 | | y=34/5 | | F/25=3/8 | | -11(5)+3x(-2)= | | (12+2x)(8+2x)=129 |