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Simplifying (7x + 4) + (4x + 9) = 90 Reorder the terms: (4 + 7x) + (4x + 9) = 90 Remove parenthesis around (4 + 7x) 4 + 7x + (4x + 9) = 90 Reorder the terms: 4 + 7x + (9 + 4x) = 90 Remove parenthesis around (9 + 4x) 4 + 7x + 9 + 4x = 90 Reorder the terms: 4 + 9 + 7x + 4x = 90 Combine like terms: 4 + 9 = 13 13 + 7x + 4x = 90 Combine like terms: 7x + 4x = 11x 13 + 11x = 90 Solving 13 + 11x = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-13' to each side of the equation. 13 + -13 + 11x = 90 + -13 Combine like terms: 13 + -13 = 0 0 + 11x = 90 + -13 11x = 90 + -13 Combine like terms: 90 + -13 = 77 11x = 77 Divide each side by '11'. x = 7 Simplifying x = 7
| 18+6(9k-13)=0 | | 16t^2-128t+240=0 | | 6.78j-5.2=4.33j+26.8 | | 5(5+3x)= | | k=18+11 | | 7x-32=10-2(3+x) | | 49p-28=52p-61 | | 5v=6v+5-v | | 12(5+2y)=4y-(6-5) | | 0-2y=11 | | 3x-12=7x+16 | | 8=5-2x | | 16x-8-3x=16 | | -5(4k+4)= | | 38=6c-12c+2 | | 3x-20= | | 6.7x=5.2x+12.5 | | 2x-10y=12 | | -6(a-7)=+a | | 5(p+1)=2p+4 | | a-6=8-(9-4) | | 4z^2+5z+3=0 | | 2(m-1)= | | 1+4x+4=-11 | | 37c+6-34c=33 | | 4h+5-(7h-8)= | | 125=p+34 | | -3x^5+9x^4-15x=0 | | -6(4x-1)+5(5x-2)-4=2-8 | | 1+(2x-1)=5x-(20-x) | | 71t-62t+3=-31t | | 4=4b-5-3 |