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Simplifying 7(x + 3) = 4(x + 9) Reorder the terms: 7(3 + x) = 4(x + 9) (3 * 7 + x * 7) = 4(x + 9) (21 + 7x) = 4(x + 9) Reorder the terms: 21 + 7x = 4(9 + x) 21 + 7x = (9 * 4 + x * 4) 21 + 7x = (36 + 4x) Solving 21 + 7x = 36 + 4x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4x' to each side of the equation. 21 + 7x + -4x = 36 + 4x + -4x Combine like terms: 7x + -4x = 3x 21 + 3x = 36 + 4x + -4x Combine like terms: 4x + -4x = 0 21 + 3x = 36 + 0 21 + 3x = 36 Add '-21' to each side of the equation. 21 + -21 + 3x = 36 + -21 Combine like terms: 21 + -21 = 0 0 + 3x = 36 + -21 3x = 36 + -21 Combine like terms: 36 + -21 = 15 3x = 15 Divide each side by '3'. x = 5 Simplifying x = 5
| 6x-8=88-10x | | -4x+6x^2=0 | | x(x+3)=x^15 | | 2(x-1)+3x=5(2+x) | | y=1.8*11+6.2 | | 3x-5=4+2 | | y=1.8*-11+6.2 | | 2x-54-76x=-99x+77 | | 8/21=-10/21x+3/7 | | 10=0.5x+5.5 | | 946=550(1+0.18t) | | 4x-13=6x+7-(2x+9) | | 76=42 | | x^2+9x+28=0 | | 4=4x+20 | | 5/9=h/63 | | 6-8x=16x | | 3.5/n=2.5/4.5 | | n/0.28=0.5/0.7 | | 19/9=n/12 | | 14/5=42/n | | 10/5=40/t | | 12/22=42/n | | n/12=36/6 | | t/4=36/6 | | 12/2=n/9 | | 11z-3-72=9 | | 3y+5=2y+6 | | 2/5d+18-d=21 | | 4a+7+2a=19 | | 1/2=9/14x-4/7 | | 3c/7-1=17 |