Answer:
x=4
Step-by-step explanation:
12 * X+3=51
Subtract 3 from each side
12x +3-3 = 51-3
12x = 48
Divide by 12
12x/12 = 48/12
x = 4
I think so answer is 3 because 3×2=6. 6+1=7 feet high
Downpayment of 20% of 989
20% * 989 = (20/100) * 989 = 0.2 * 989 = 197.8
Down payment = 197.8
Remainder = 989 - 197.8 = 791.2
Therefore remainder = $791.20
Hope this explains it.