Question

simplify (2a+3b+4c),(3a+5a+7c)​

Answer 1

Answer:

Starting with the second given equation;

3a + 5b + 7c = 30

(2a + 3b + 4c) + (a + 2b + 3c) = 30

35 + (a + 2b + 3c) = 30

a + 2b + 3c = -5______(1)

Now, using the first equation

2a + 3b + 4c = 35

( a + 2b + 3c) + (a + b + c)=35

-5 +(a + b + c)=35 [ using__(1)]

a + b +c=40

Answer 2

Answer:

2a+3b+4c= 35 (1)

3a+5b+7c =30. (2)

by sub equation (1) from equation (2)

a+2b+3c= -5 (3)

sub equation(3) from equation(1)

a+b+c=35-(-5)=40

a+b+c=40