There were 685 hot air balloon pilots at a hot air balloon race. There were 1,570 more ground crew
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13+4x=1-x
4x=-12-x (minus 13 from each side)
5x=-12 (add x to each side)
You divide -12 by 5x
-12÷5x=2
⇒2.4
x=2.4
4x=-12-x (minus 13 from each side)
5x=-12 (add x to each side)
You divide -12 by 5x
-12÷5x=2
x=2.4