how do i solve -5(5n-7)+2(-6+8n)=23
Expand the brackets, rearrange, simplify and solve.
-5(5n-7)+2(-6+8n)=23
-25n + 35 - 12 + 16n = 23
-25n + 16n + 35 - 12 = 23
-9n + 23 = 23
-9n = 0
n = 0
If you put n = 0 in the original equation, you will see that lhs = rhs.