I am a parent of a 10 year old, 5th grader and my hubby and I just can't figure these out to help her. Anyone?? Thanks in advance.

27 = 8k divide k = ??

5a - 3a = 18 a = ??

12r - 4r = 48 r = ??

g = 7(10-3) g = ??

These are finding the unknown number in each equation.
Thanks so much

3 answers

27 = 8k
Divide both sides of the equation by 8.

27/8 = k
3.375 = k
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5a - 3a = 18
2a = 18
a = 9

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Can you do the rest yourself? We'll be glad to check your answers.

12r-4r=48r=

5a-3a=18. What does a equal?