Answer:
x=-1
Step-by-step explanation:
plug in -1 to equation
3(-1)-13=-2(9+(-1))
-3-13=-2(-8)
-16=-16
it checks.
Answer:
$960
Step-by-step explanation:
take the total salary to be 100%, since the taxes are 20% subtract 20% from 100% to get 80% which will represent the left over after the taxes have been taken so say if 100%=$1200 what about 80% 80times 1200 then divide by 100.

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C. All students in each grade.
Hopefully, this helps you!!

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