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Simplifying (12 + -1x) + 9 = 20 Remove parenthesis around (12 + -1x) 12 + -1x + 9 = 20 Reorder the terms: 12 + 9 + -1x = 20 Combine like terms: 12 + 9 = 21 21 + -1x = 20 Solving 21 + -1x = 20 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + -21 + -1x = 20 + -21 Combine like terms: 21 + -21 = 0 0 + -1x = 20 + -21 -1x = 20 + -21 Combine like terms: 20 + -21 = -1 -1x = -1 Divide each side by '-1'. x = 1 Simplifying x = 1
| (18-x)+7=23 | | 32x^5-28x^4= | | 10-7x=60-42x | | 2x+17=26-x | | (3y-5v-6)(7y+7v-2)= | | (7u+6)(5u-4w-6)= | | 3(a-1)=-a | | -0.5(10x+12)=-1(40x-64) | | (5-v)(5-v)= | | 13=7x-15 | | (v+7)(v+7)= | | (3y^2z^5-5y^3)(8yz^6)= | | 2.5x+4=0.5x+12 | | Y^2+x^2=0 | | -5xy^6(7x^3-3x^2y^4+8y^4)= | | 30(x+4)=5(66-5x) | | 30(x+4)=5 | | -5(5x+3)=40x-145 | | -5a^5c^6(7c^2-3a+8)= | | 5(x+2)-5=45 | | 5(x+9)+16=82 | | 2x-9=7x+11 | | 5x-16=3x-6 | | y^2-3xy+x^2-3=0 | | 6x+18=3x-12 | | ln(x^2-64)-ln(x+8)=0 | | 10c^8(4c+7c^5)= | | (8u^2-2u+9)-(-5u^2+9u-7)+(9u^2+8u+7)= | | 3*x=x+8 | | 5x+6=-204 | | 3x-y=28 | | (8u^2-7u+9)+(3u^2-9u-9)-(7u^2-2u-1)= |