Answer:
age of boy = 12
age of mother = 4 times age of boy = 4*12 = 48
let x = years time
3(12+x) = 48+x
36+3x = 48+x
3x-x = 48-36
2x = 12
x = 6
In 6 years time the mother will be three times as old as the son.
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Answer:
$80
Step-by-step explanation:
If we took 40% off that means that it now costs 60% of the original cost. So we are asking 60% of what number is 48?
Let x = the original cost
.6x = 48 Divide both sides by .6
x = 80.
Let's check.
What is 40% of 80?
.4 x 80 = 32. Subtract the discount from 80
80 - 32 = 48 The discounted price.
Answer:
Step-by-step explanation: