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Step2247 [10]
3 years ago
5

PLEASE HELP ME ASAP I WILL MARK YOU AS BRILLIANTplease help with these three

Mathematics
1 answer:
GalinKa [24]3 years ago
6 0

Answer:

26:  x=34

28: x=17

30: m=30

Step-by-step explanation:

<u>26:</u> 2x+22=90

subtract 22

2x=68

divide by 2

x=34

<u>28:</u> 18+3x+21=90

add 18 and 21

3x+39=90

subtract 39

3x=51

divide by 3

x=17

<u>30:</u> 43+87+m+20=180

add 43 and 87 and 20

m+150=180

subtract 150

m=30

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