Solve for x. 7 – 4x = 31 A. x = 6 B. x = 9.5 C. x = –6 D. x = –9.5
Accepted Solution
A:
7-4x= 31Bring over 7 to the other side Positive 7 changes into negative 77-7-4x= 31-7-4x= 24Divide by -4 for -4x and 24-4x/-4= 24/-4x= -6 Check answer by using substitution method7-4x= 317-4(-6)= 317+24= 3131= 31 Answer : C. x= -6