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Simplifying 2r + (20 + -1r) + -3 = 30 Remove parenthesis around (20 + -1r) 2r + 20 + -1r + -3 = 30 Reorder the terms: 20 + -3 + 2r + -1r = 30 Combine like terms: 20 + -3 = 17 17 + 2r + -1r = 30 Combine like terms: 2r + -1r = 1r 17 + 1r = 30 Solving 17 + 1r = 30 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-17' to each side of the equation. 17 + -17 + 1r = 30 + -17 Combine like terms: 17 + -17 = 0 0 + 1r = 30 + -17 1r = 30 + -17 Combine like terms: 30 + -17 = 13 1r = 13 Divide each side by '1'. r = 13 Simplifying r = 13
| 3x^2-30x+80=5 | | .75x-30=45 | | 5(-3)-2=-17 | | -29=y-11 | | x^3+11x^2+12x+18=0 | | 7x+8=74 | | 4=3-b | | 5x-16=4-3x | | 13-n=10 | | 2x=4b+2b | | -2(j+3)=-2j+6 | | 4.4=8.9-0.9x | | -4(y-4y)+9=-3(3y-y)+7+17y | | 20r^2-245=0 | | 9m+8=5m-12 | | 8(7+2)= | | 3v+14=9-22 | | .04x=2x+1.2 | | X^2+72x-150=0 | | 11r=13 | | -2(x+2)+5=8(x+5)+2 | | 17g-16g=12 | | 5x+50y=-30 | | 6x^4-23x^3+28x^2-13x+2=0 | | -9.5-(-5.1)= | | 12-7=4x-x+2 | | .16x+.9(x-1)=.01(5x-1) | | 2x-4+2(9x)= | | 2x*5=27 | | -5p+17p+-11p+7=-9 | | 20-16z=1-17z+7 | | 0=-27t+3t^2 |