Question 84546
-7x + 9x = 10
{{{(-7+9)x=10}}}
{{{2x=10}}}
{{{2x/2=10/2}}}
{{{highlight(x=5)}}}
:
Proof:
-7(5)+9(5)=10
-35+45=10
10=10  We're right!
Happy Calculating!!!