4(15)+23=21y-1

Solution for 4(15)+23=21y-1 equation:

Simplifying
4(15) + 23 = 21y + -1

Multiply 4 * 15
60 + 23 = 21y + -1

Combine like terms: 60 + 23 = 83
83 = 21y + -1

Reorder the terms:
83 = -1 + 21y

Solving
83 = -1 + 21y

Solving for variable 'y'.

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

Add '-21y' to each side of the equation.
83 + -21y = -1 + 21y + -21y

Combine like terms: 21y + -21y = 0
83 + -21y = -1 + 0
83 + -21y = -1

Add '-83' to each side of the equation.
83 + -83 + -21y = -1 + -83

Combine like terms: 83 + -83 = 0
0 + -21y = -1 + -83
-21y = -1 + -83

Combine like terms: -1 + -83 = -84
-21y = -84

Divide each side by '-21'.
y = 4

Simplifying
y = 4