3 February, 14:12
How do I do this?
3 February, 15:03
remember that what you do in one side, do it in the other
3 February, 15:19
Simplify: 4r + 3 = r + 21, then reorder the terms: 3 + 4r = r + 21.
Reorder the terms 3 + 4r = 21 + r. Solve: 3 + 4r = 21 + r.
Move all terms containing r to the left, all other terms to the right.
Solving for variable 'r'.
Add '-1r' to each side of the equation. 3 + 4r + - 1r = 21 + r + - 1r.
Combine like terms: 4r + - 1r = 3r 3 + 3r = 21 + r + - 1r
Combine like terms: r + - 1r = 0 3 + 3r = 21 + 0 3 + 3r = 21
Add '-3' to each side of the equation. 3 + - 3 + 3r = 21 + - 3
Combine like terms: 3 + - 3 = 0 0 + 3r = 21 + - 3 3r = 21 + - 3
Combine like terms: 21 + - 3 = 18 3r = 18
Divide each side by '3'. r = 6 Simplifying r = 6
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» 4r+3=r+21 How do I do this?