Distribute add 28 to both sides Divide by negative one This means that for this particular equation, x can be ANY value. The domain is (-infinity, infinity) Any X value will satisfy the equation above ^_^ For example, x can equal (any number, even) one: -6(1+3)-10=3(-2(1)-5)-13 -6(4)-10=3(-7)-13 -24-10=-21-13 -34=-34 Thus the equation is satisfied. Another example: X=0 (note please that all values of x will satisfy this equation) -6(0+3)-10=3(-2(0)-5)-13 -6(3)-10=3(-5)-13 -28=-28