3.5r=3(4+5r)

Solution for 3.5r=3(4+5r) equation:

Simplifying
3.5r = 3(4 + 5r)
3.5r = (4 * 3 + 5r * 3)
3.5r = (12 + 15r)

Solving
3.5r = 12 + 15r

Solving for variable 'r'.

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

Add '-15r' to each side of the equation.
3.5r + -15r = 12 + 15r + -15r

Combine like terms: 3.5r + -15r = -11.5r
-11.5r = 12 + 15r + -15r

Combine like terms: 15r + -15r = 0
-11.5r = 12 + 0
-11.5r = 12

Divide each side by '-11.5'.
r = -1.043478261

Simplifying
r = -1.043478261