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