Answer:
First answer is 5 hours
Second answer is 7 weeks
First question explanation:
Make an equation to find out when the companies prices are equal
Let x be the number of hours, so we isolate that one
10 +5x = 7x
subtract 5x from both sides
10= 2x
5=x
Second question explanation:
Same as the first one, setting up an equation as follows:
let x be number of weeks
500-20x=150+30x
add 20x to both
500 = 150 + 50x
subtract 150 from both sides
350 = 50x
divide both sides by 50
7 = x