Question

Question # 2
What is the value of a x b?
(1) 6a + 4b = 43
(2) 3a + 12b = 63​

Answer 1

Answer:

10b=63-21.5

b=41.5/10

b=4.15

3a+8.3=21.5

3a=13.2

a=4.4

Answer 2

Solution:

According to the question:

Given Data

(1) 6a + 4b = 43

(2) 3a + 12b = 63

To Find:

What is the value of a \times b?

Step-by-step explanation:

Step 1:

To find the value of b:

10b = 63-21.5

Subtract both the values

Step 2:

b $=\frac{41.5}{10}$

Divide the value by 10

Step 3:

The value of b is:

b=4.15

Step 4:

Subtract both the values

3a+8.3 = 21.5

Step 5:

Divide the value by 3

3a = 13.2

A $=\frac{13.2}{3}$

Step 6:

The value of a is:

a=4.4

Step 7:

Substitute the a value in equation (1)

6$\times$ 4.4 + 4b = 43

4b = 43 - 26.4

b = 4.15

Step 8:

then,

a$\times$ b = 4.4$\times$ 4.15

           = 18.26.