12x - 4y = -8
y = 3x + 2
Rewrite the first equation
12x + 8 = 4y
3x + 2 = y
As you see, the first and second equation are actually the same, meaning there's an infinite number of solutions.
Answer:
Jo's Number is 20.
Step-by-step explanation:
4 - ( 9 x ? ) = 176.
9 x 20 = 180.
9 x 20 = 180, then subtract 180 by 4.
180 - 4 = 176.
Therefore, Jo's number is 20.
$5 each car
3 hours = 12 cars
÷3 ÷3
1 hours = 4 cars
×8 ×8
8 hours = 32 cars
32 cars × $5 per car =
$160
They earned $160 in 8 hours, from washing 32 cars.
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