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Simplifying (7x + -9) + 2x = 90 Reorder the terms: (-9 + 7x) + 2x = 90 Remove parenthesis around (-9 + 7x) -9 + 7x + 2x = 90 Combine like terms: 7x + 2x = 9x -9 + 9x = 90 Solving -9 + 9x = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + 9x = 90 + 9 Combine like terms: -9 + 9 = 0 0 + 9x = 90 + 9 9x = 90 + 9 Combine like terms: 90 + 9 = 99 9x = 99 Divide each side by '9'. x = 11 Simplifying x = 11
| d*7=35 | | -9+4x-6x=1 | | 13+(6+x)=20 | | (z^2+z)+(z^2-11)= | | 3x-1=12-x | | -8x-6x=-14 | | x-8=10-x | | 24-q=13 | | 7w-6(w-5)=7 | | 21+r=-19.79 | | 23+18u=-21+14u | | 6(2)+4=16 | | 9(-8)-4(-6)(-4)= | | 4x=48-4x | | 5*[p+6]=8p | | -49=-4x^2 | | (8-n)2+13=23 | | 6p+2=8p | | 26-2x=2x | | m-7.7=21.7 | | -x+8=4x-12 | | (3c^3-c+11)-(c^2+2c+8)= | | 4x+17=25+5x | | 6(10)+4=16 | | 20-3x=-8x | | 0=t+(-14) | | 2z+5=-9z | | 3(7y+4x)= | | 6x+4-4x=7x-8+x | | r+11.704=-14.896 | | 50n+60n=140 | | 3p+5=4p+11 |