1 answer:
4(7a + 5) = -160
mutiply the bracket by 4
(4)(7a)(4)(+5)= -160
28a+20= -160
move +20 to the other side
sign changes from +20 to -20.
28a+20-20= -160-20
28a= -180
Divide by 28
28a/28= -180/28
x= -180/28
reduce by dividing 4
-180/4= -45
28/4= 7
-45/7 or -6 3/7
Answer : x= -45/7 , x= -6 3/7
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