Answer:
Tim needs to mow 5 more lawns in order to buy his new lawnmower
Step-by-step explanation:
1) Tim has already mowed $30 worth of lawns
2) Tim makes $10 per mow
4) Tim needs to make $75 total for his new mower
5) $75 - $30 = $45
6) Tim needs to make $45 in order to get his new mower
7) 5 x 10 = 50
8) Tim needs to mow 5 lawns in order to make over $45
9) If Tim only mowed 4 lawns he would make $40 and still be $5 short
