Question

22.
If A = 2a + 3b, B = 7a + 18b, C = – 6a – b, then find the
a) A +B
b) B + C
C) A + C
23.
If A = x + y + 2z, B = 2x – y – 3z, C = x - y + z, then find​

Answer 1

Answer:

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Explanation:

The value of c would be 24

Step-by-step explanation:

Given,

(a+b):(b+c):(c+a)=5:7:6            ........(1),

2a-3b+4c=66                         .........(2),

From (1),

                 .........(3),

Again from equation (1),

                 .............(4)

Equation (3) + equation (4),

                     .............(5),

2 × Equation (4) + 7 × Equation (2),

-14a + 12b - 2c + 14a - 21b + 28c = 462

-9b + 26c = 462           ..........(6)

9 × equation (5) + 8 × equation (6),

-54c + 208c = 462

154c = 3696

Hence, the value of c is 24.

Answer 2

Answer:

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Explanation:

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