3 years ago

3a+5b+2c=? a+b=15 b+c=14 5b=3b,2b

Mathematics

2 answers:

Illusion [34]3 years ago

7 0

Answer:

Step-by-step explanation:

3a + 5b + 2c = ?

Given:

a + b = 15

b + c = 14

now express in terms of b

a = 15 - b equation (i)

c = 14 - b equation (ii)

3a + 5b + 2c

substitute the values

3(15 - b) + 5b + 2(14 - b)

45 - 3b + 5b + 28 - 2b

add or subtract like terms

73 + 5b - 5b

plus 5b and minus 5b gets cancel

julia-pushkina [17]3 years ago

5 0

Step-by-step explanation:

please check you typing 5b = 3b, 2b

?????

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