Answer:
1) x ≤ 25. 2) a. 3x = 135 b. $45
Step-by-step explanation:
Question 1
Eric has to spend $115 and he has spent $90. We need to know how much money he can spend, therefore:
Let x = the money he can now spend
90 + x ≤ 115
x ≤ 115 -90
x ≤ 25.
Question 2
In this question we don't know how much money Sofia had. So:
Let x = Money that Sofia had.
If her mother gave her twice what she already had, that mean that she gave her 2x.
The money she had combined by the money her mother gave her was $135, which can be expressed as:
x + 2x = 135
a) 3x = 135
Therefore, we can know how much she had before her birthday.
3x = 135
x = [tex]\frac{135}{3}[/tex]
x = $45
She had $45 before her birthday
