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Simplifying (9r + 9) + -1(r + -2) = 0 Reorder the terms: (9 + 9r) + -1(r + -2) = 0 Remove parenthesis around (9 + 9r) 9 + 9r + -1(r + -2) = 0 Reorder the terms: 9 + 9r + -1(-2 + r) = 0 9 + 9r + (-2 * -1 + r * -1) = 0 9 + 9r + (2 + -1r) = 0 Reorder the terms: 9 + 2 + 9r + -1r = 0 Combine like terms: 9 + 2 = 11 11 + 9r + -1r = 0 Combine like terms: 9r + -1r = 8r 11 + 8r = 0 Solving 11 + 8r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-11' to each side of the equation. 11 + -11 + 8r = 0 + -11 Combine like terms: 11 + -11 = 0 0 + 8r = 0 + -11 8r = 0 + -11 Combine like terms: 0 + -11 = -11 8r = -11 Divide each side by '8'. r = -1.375 Simplifying r = -1.375
| x^2-9x-90=0 | | 800,000+100,000+60,000+100,000+5,000+20,000+40,000+100,000+100,000+800,000+50,000+700,000+30,000+180,000+500,000+160,000= | | x-2+7=14 | | 6=-y | | 10x^2-12=7x | | 3v+16=3(v+9) | | (10x+4)-(6x-9)= | | 10a-35=-8+1 | | 0.02x+0.03(60000-x)=1600 | | 12x^2+7x=12 | | 2x-8=76-10x | | -1.8(4p-2)-2.8p= | | -22-x=-11 | | 0.15x+0.05(70000-x)=5000 | | 5ab-ab= | | x^4-2x^3-7x^2+8x+12=0 | | 4m^3+4m+1=0 | | -9*0-10y=90 | | (8y+4)-(5y+7)= | | 12x+180=160x | | -7(2x+1)=4 | | 15+12=27 | | 4*(x-5)=-5 | | 12x+180=13x | | 2y-4=6y+16 | | 12(x-2)=4(3x-6) | | 2*9x^2= | | x^2+0.5x+1=0 | | 7z=2y | | 2(n-3)=6 | | x^4-x^3+4x^2-16x-192=0 | | 27.52-40= |