Answer:
x=17, y=9. (17, 9).
Step-by-step explanation:
x+y=26
3x+8y=123
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x=26-y
3(26-y)+8y=123
78-3y+8y=123
78+5y=123
5y=123-78
5y=45
y=45/5
y=9
x=26-9=17
second answer to the left
Answer:
$63
Step-by-step explanation:
30% of 90 is 27
90-27=63
Answer:

Step-by-step explanation:
Given

Required
The equivalent
We have:

Expand

Collect like terms


Hence, the equivalent is:

Answer:
-43
Step-by-step explanation:
Using PEMDAS and multiplying first gives you (-5 + 7) - 45
This gives you 2 - 45 which equals -43