Answer:
do the opposite of the equation so adding is subtracting and multiplying is dividing
-30-7=-37
-37+13=-24
-24 is the answer
-24+7=-17-13=-30
Hope this helps
Step-by-step explanation:
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Answer:
A or D
Step-by-step explanation:
I cant totally remember, but a and d make sense. sorry, I learned about this in 6th
you can plug the x value (9y) into the second equation
5(9y) + 3y = -48
45y + 3y = -48
48y = -48
y = -1
x = 9(-1)
x = -9