5[r+4]=45

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Solution for 5[r+4]=45 equation: 


Simplifying
5[r + 4] = 45

Reorder the terms:
5[4 + r] = 45
[4 * 5 + r * 5] = 45
[20 + 5r] = 45

Solving
20 + 5r = 45

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-20' to each side of the equation.
20 + -20 + 5r = 45 + -20

Combine like terms: 20 + -20 = 0
0 + 5r = 45 + -20
5r = 45 + -20

Combine like terms: 45 + -20 = 25
5r = 25

Divide each side by '5'.
r = 5

Simplifying
r = 5

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