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Simplifying 9r + -7(r + -9) + 4(s + -9) = 0 Reorder the terms: 9r + -7(-9 + r) + 4(s + -9) = 0 9r + (-9 * -7 + r * -7) + 4(s + -9) = 0 9r + (63 + -7r) + 4(s + -9) = 0 Reorder the terms: 9r + 63 + -7r + 4(-9 + s) = 0 9r + 63 + -7r + (-9 * 4 + s * 4) = 0 9r + 63 + -7r + (-36 + 4s) = 0 Reorder the terms: 63 + -36 + 9r + -7r + 4s = 0 Combine like terms: 63 + -36 = 27 27 + 9r + -7r + 4s = 0 Combine like terms: 9r + -7r = 2r 27 + 2r + 4s = 0 Solving 27 + 2r + 4s = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-27' to each side of the equation. 27 + 2r + -27 + 4s = 0 + -27 Reorder the terms: 27 + -27 + 2r + 4s = 0 + -27 Combine like terms: 27 + -27 = 0 0 + 2r + 4s = 0 + -27 2r + 4s = 0 + -27 Combine like terms: 0 + -27 = -27 2r + 4s = -27 Add '-4s' to each side of the equation. 2r + 4s + -4s = -27 + -4s Combine like terms: 4s + -4s = 0 2r + 0 = -27 + -4s 2r = -27 + -4s Divide each side by '2'. r = -13.5 + -2s Simplifying r = -13.5 + -2s
| 3x+4x=64 | | -7x+33=145 | | y=6x^2-x-2 | | (4i)(5i)= | | 22-5x+9x=-2(-5x+1) | | 2+8(7+x)=85 | | 9x+4=-8 | | -33-14y+16=-30y+100+7y | | -2x=-17 | | 144+3x=4*98 | | -33-14y+16=130y+100+7y | | 10(3-x)= | | 7(x+2)=3x+5+7x | | 6w+6x= | | 144=3x+(3x+4) | | 8(r-3)=r-45+4r | | X^2+2x+12=15 | | 56-8x=128 | | 9h-23=49 | | y=2x^2+2x-1 | | k-10+7k=5(k+1) | | 22+2y-7=11y-13-5y | | 4.20=U+.75S | | 5*x+3=-3*5 | | (5y+8)-(7+4y)=11 | | 6x+24=2x-30 | | -41-16y+17=-35y+25+12y | | -210=9x-75 | | 1.2=20 | | -28-8y+13=-22y+30+9y | | (X+3)(4x+7)=4x^2+px+21 | | U=.75S+4.20 |