The product of a and b is nine less than the number b.
The sum of a and twice b is 35. Which two equations
could be used to determine the value of a and b
?
 |
ab = b - 9
|
| |
2ab
= 35 |
| |
a
+ b - 9 = b |
| |
2ab - b
= 35
|
| |
ab
- 9 = b |
| |
a
+ 2b = 35 |
 |
ab
= b - 9 |
| |
a
+ 2b = 35 |
| |
ab
- 9 = b |
| |
2ab
= 35
|
|
Translate piece by piece:
“The product of
a and
b ” indicates multiplication:
(
a)(
b) or
ab
“nine less than the number
b” indicates subtraction:
b
– 9
“The product of
a and
b is nine less than the number
b.”:
ab =
b
– 9
(There’s one equation).
“The sum of
a”: This indicates addition:
a
+
“and twice
b”: That’s 2
b
“The sum of
a and twice
b
is 35.”:
a + 2
b = 35
(There’s the second equation).
The fourth choice matches what we found. Note that we don’t care
what
a and
b
actually are;
the question only asks us to translate, so that’s all we need to do.
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Video Lessons and 10 Fully Explained Grand Tests
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