How many solutions? 3x+9-6x(6+8)=7(7+3)
3x+9-6x(6+8)=7(7+3)
Simplify everything inside the parenthesis.
3x+9-6x*14 = 7*10.
Combine like terms.
-81x+9 = 70.
Isolate x.
-81x = 61
x=-61/81 --> 1 solution