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Simplifying 4 + 3r + 4r = 7(2 + -1r) + 8(1 + 2r) Combine like terms: 3r + 4r = 7r 4 + 7r = 7(2 + -1r) + 8(1 + 2r) 4 + 7r = (2 * 7 + -1r * 7) + 8(1 + 2r) 4 + 7r = (14 + -7r) + 8(1 + 2r) 4 + 7r = 14 + -7r + (1 * 8 + 2r * 8) 4 + 7r = 14 + -7r + (8 + 16r) Reorder the terms: 4 + 7r = 14 + 8 + -7r + 16r Combine like terms: 14 + 8 = 22 4 + 7r = 22 + -7r + 16r Combine like terms: -7r + 16r = 9r 4 + 7r = 22 + 9r Solving 4 + 7r = 22 + 9r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-9r' to each side of the equation. 4 + 7r + -9r = 22 + 9r + -9r Combine like terms: 7r + -9r = -2r 4 + -2r = 22 + 9r + -9r Combine like terms: 9r + -9r = 0 4 + -2r = 22 + 0 4 + -2r = 22 Add '-4' to each side of the equation. 4 + -4 + -2r = 22 + -4 Combine like terms: 4 + -4 = 0 0 + -2r = 22 + -4 -2r = 22 + -4 Combine like terms: 22 + -4 = 18 -2r = 18 Divide each side by '-2'. r = -9 Simplifying r = -9
| 4t-2s=7 | | 2/3×8/9= | | 4x-1y=48 | | 0.2t+0.3(40-t)=9.9 | | 2+3f=4f+10 | | 0.05t+0.1(100-t)=6.5 | | (4y-1)(5-y)=0 | | 1/6•5/7 | | x-6/5x-2= | | 0.09y+0.12(100-y)=9.6 | | 4+ln(x+4)=2 | | (2x+1)(6x+7)= | | -u/0.8=1.5 | | 9=18v-9v | | (3x)(-2x-6)= | | 9=18w-9v | | 7/x-4=0 | | 4y-5=y+7 | | (x)(8x^2+y^2+1)= | | -0.10(59)+0.55x=0.05(x-18) | | X^2=25-18x | | 3.5+t=11.25 | | (-3x-1)(6x+3)= | | 6x+3=5x+20 | | (4+2x)(7+2x)=54 | | X+8=-2x+6x+5 | | X^2+18x=25 | | (7x^2-4)(x-1)= | | 0=-0.50+f | | ln(x-1)+ln(2x+4)=2ln(x+1) | | 12=4+3x-7 | | 7n+15=42-2n |