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Simplifying 2r + -4r + 7 = 0 Reorder the terms: 7 + 2r + -4r = 0 Combine like terms: 2r + -4r = -2r 7 + -2r = 0 Solving 7 + -2r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -2r = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -2r = 0 + -7 -2r = 0 + -7 Combine like terms: 0 + -7 = -7 -2r = -7 Divide each side by '-2'. r = 3.5 Simplifying r = 3.5
| 13-2x=3x+3 | | 14y-12y=8 | | 0.5x+3.5x-2.3-4.3=29.4 | | 19f^2+43f=0 | | 40=(.5)(.0005)(.0005) | | 4a+20=84 | | 40=(.5)(.0005)2 | | -84=8-4(-3x+2) | | x(10-X)=40 | | 138z/z+8z=324z/2z | | c=-384+12f | | -84-7x=8x-21 | | 2x-2y+16=12x-4 | | -2(x--3)-12=30 | | 420x=5000 | | -2k+15+4k+15=-6 | | (x-7)=20 | | k=140 | | 3/7m=21 | | c=12(f-32) | | 16x-3=32x+9 | | 5-3=7-4 | | x/2+2x=3x-1/4 | | 15a^2+23a-28=0 | | 9.8=5/1+10x/y | | 42x=5000 | | 1-3(2w+1)=8w-3(8+w) | | 15-3=4x+8x | | 42cmx=5m | | 90=-6(x-7) | | 4*1+5= | | 9.8=5/1+10x/x |