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Simplifying 2[3r + 7] + -1[2 + r] = 0 Reorder the terms: 2[7 + 3r] + -1[2 + r] = 0 [7 * 2 + 3r * 2] + -1[2 + r] = 0 [14 + 6r] + -1[2 + r] = 0 14 + 6r + [2 * -1 + r * -1] = 0 14 + 6r + [-2 + -1r] = 0 Reorder the terms: 14 + -2 + 6r + -1r = 0 Combine like terms: 14 + -2 = 12 12 + 6r + -1r = 0 Combine like terms: 6r + -1r = 5r 12 + 5r = 0 Solving 12 + 5r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + 5r = 0 + -12 Combine like terms: 12 + -12 = 0 0 + 5r = 0 + -12 5r = 0 + -12 Combine like terms: 0 + -12 = -12 5r = -12 Divide each side by '5'. r = -2.4 Simplifying r = -2.4
| 6/x=8/10 | | 544+e=99999999999 | | -9(r-2s-7t)= | | 0.5x=0.5x+5 | | 6x-2+2x-7=-89 | | 2x+6y=-7 | | 5(41)-43=2(41)+80 | | 12n=2a+30 | | 349-y=14 | | 3(2p+7)=15p(p-4) | | 8x+27=2x+177 | | 0.5(t-12)=1.5+-3 | | 3y/x=-4 | | 4y-5+y=1+4y | | 1/2(2x-6)6 | | Y^2+225Y=0 | | u=4j | | 100=64+24t+-4t^2 | | r/16 | | 11,1*60/10= | | -b+3-1=34 | | -11(-8)=-4(-8)+56 | | 4/0.4/0.3×7-0.3^2= | | (2m+7)+(-4m+-10)= | | 4949=4900(1+.25r) | | 3w+9w+8=-10+10w | | 18(3.14)+6(3.14)= | | 9x+3=9x+5 | | 11,1x60/10 | | 18(3.14)+6(3.14)x= | | n*7+7=9*n-1 | | 2.5•1/81 |