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5(a + b) + 21 for a=15 and b=27
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5(a + b) + 21 for a=15 and b=27

User Jianxiang Xia
by
7.7k points

2 Answers

5 votes

5(a + b) + 21


5(a(15) + b) + 21
Substitute \ a \ for \ 15


5(a(15) + b(27)) + 21
Substitute \ b \ for \ 27


5(15 + 27) + 21


5*42+21


210+21


= 231
User TheZenker
by
8.2k points
3 votes
5(15+b)+21=
75+5b+21=
96+5b=
5b= -95
b= -19 1/5

5(a+27)+21=
5a+135+21=
5a+156=
5a= -156
a= -31 1/5

5(15+27)+21=
75+135+21=
231
User Timotree
by
7.4k points
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