2n+5+7n-8=15
(2n+7n)+(5-8)=15
combine like terms and solve for n!
2n+5+7n-8=15
Combine like terms. Then get the knowns on one side and the unknowns on the other.
9n = 15 - 5 + 8
9n = 18
n = ?
To solve the equation 2n + 5 + 7n - 8 = 15, we need to combine like terms and isolate the variable n on one side of the equation. Here's how you can do it step by step:
1. Combine like terms: Add the coefficients of the variables and the constants.
2n + 7n + 5 - 8 = 15
(2n + 7n) + (5 - 8) = 15
9n - 3 = 15
2. Simplify the constants: Add or subtract the numbers on the right side of the equation to get a single constant.
9n - 3 + 3 = 15 + 3
9n = 18
3. Isolate the variable: Divide both sides of the equation by the coefficient in front of the variable to solve for n.
(9n) / 9 = 18 / 9
n = 2
So the solution to the equation 2n + 5 + 7n - 8 = 15 is n = 2.