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Simplifying 15 = r + (-4) 15 = r + -4 Reorder the terms: 15 = -4 + r Solving 15 = -4 + r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-1r' to each side of the equation. 15 + -1r = -4 + r + -1r Combine like terms: r + -1r = 0 15 + -1r = -4 + 0 15 + -1r = -4 Add '-15' to each side of the equation. 15 + -15 + -1r = -4 + -15 Combine like terms: 15 + -15 = 0 0 + -1r = -4 + -15 -1r = -4 + -15 Combine like terms: -4 + -15 = -19 -1r = -19 Divide each side by '-1'. r = 19 Simplifying r = 19
| 230*230= | | x+4=3-2x | | y+7x=-5 | | 8+5x=2-4x | | 2x+3y+x+z+2y= | | 2*(230-0.5y)=460 | | x+(x-25)+(x-2)=180 | | 7p-4=3p+16 | | 30-2x+2=8 | | 4(3x+8)=3x-4 | | 7x+5=2x+30 | | 30+6x=15x | | 10y+4=7y+28 | | 2+4secx=-6 | | 9=8-8a | | m+5(5m+2)=140 | | 4x+3x=85.50 | | p+38=3p+20 | | f(n)=4n+13 | | 2*(230-0.5y)=0 | | 3x+10=-5x-19 | | 0.03-0.1y=0.05 | | 6x-18=x+12 | | 2e^6t=4e^5t | | (y+110)+30=180 | | -8(6x-1)+7(7x-3)-9=7-4 | | 2b-68+2b=180 | | 3y-1+y+37=6y+40-4y | | 2y+3x+3=0 | | (y+30)+110=180 | | (1+m)x^2-3mx+(1-m)=0 | | 3y-1+y+37y=6y+40-4y |