How do you solve #-8x = - 21- 9x#?
2 Answers
Apr 26, 2018
Explanation:
#"collect terms in x on the left side of the equation"#
#"and numeric values on the right side"#
#"add 9x to both sides"#
#-8x+9x=-21cancel(-9x)cancel(+9x)#
#rArrx=-21#
#color(blue)"As a check"# Substitute this value into the equation and if both sides are equal then it is the solution.
#"left "=-8xx-21=168#
#"right "=-21+(-9xx-21)=-21+189=168#
#rArrx=-21" is the solution"#
Apr 26, 2018
Explanation:
We need to put every expression with