Step-by-step explanation:
10x - 12.9 = -23.6 + 9x
+12.9 +12.9
------------------------------------
10x = -10.7 +9x
-9x -9x
x = -10.7
Check your work:
10 (-10.7) -12.9 = -23.6 + 9 (-10.7)
-107 - 12.9 = -23.6 - 96.3
-119.9 = -119.9
When you get an answer like the one above, you know that the solution for x you found was correct. Therefore, x equals -10.7.
Answer:
x=-10.7
Step-by-step explanation:
1 Regroup terms.
10x-12.9=9x-23.6
2 Subtract 9x9x from both sides.
10x-12.9-9x=-23.6
3 Simplify 10x-12.9-9x to x-12.9x−12.9.
x-12.9=-23.6
4 Add 12.9 to both sides.
x=-23.6+12.9
5 Simplify -23.6+12.9 to -10.7
x=-10.7
