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jpsaad00
18.02.2021 •
Mathematics
How to find value of x when given the length, width and total surface area
Example - Diagram screenshot above:
Total Surface Area of cuboid: 2lb + 2bh + 2hl
Length: 10cm
Base: 2cm
Height: xcm
Simplify:
2(10)(2) + 2(2)(x) + 2(x)(10) = 112
40 + 4x + 20x = 112
40 + 24x = 112
Make x the subject, therefore subtract 40 on both sides.
24x = 112 - 40
24x = 72
Find the value of x, hence divide by 24 on both sides.
x = 72/24
x = 3
Solved
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Ответ:
x/3−8
step-by-step explanation:
"eight less than" is -8
"the quotient of x and 3" is x/3