Question

If 2x+5y=18 and x=2 , what is the value of 4x+5y:

a) 20 b) 19 c) 22 d) 21

Answer 1

Answer:

option c) 22

2x+5y=18and x=2 so 2(2)+5y=18

4+5y=18 so, 5y=14...

y=14/5

then, 4x+5y=?

4(2)+5(14/5)

8+14

22

Answer 2

Answer:

Option c = 22

Step-by-step explanation:

Given,

Given, X = 2

Given, X = 2Put the value of x in 2x+5y=12

Given, X = 2Put the value of x in 2x+5y=12=> 4 + 5y = 18

Given, X = 2Put the value of x in 2x+5y=12=> 4 + 5y = 18=> 5y = 14

Given, X = 2Put the value of x in 2x+5y=12=> 4 + 5y = 18=> 5y = 14=> y = 14/5

Given, X = 2Put the value of x in 2x+5y=12=> 4 + 5y = 18=> 5y = 14=> y = 14/5We get x=2 and y = 14/5. Now, put the values in 4x + 5y

Given, X = 2Put the value of x in 2x+5y=12=> 4 + 5y = 18=> 5y = 14=> y = 14/5We get x=2 and y = 14/5. Now, put the values in 4x + 5y=> 4×2 + 5×14/5

Given, X = 2Put the value of x in 2x+5y=12=> 4 + 5y = 18=> 5y = 14=> y = 14/5We get x=2 and y = 14/5. Now, put the values in 4x + 5y=> 4×2 + 5×14/5=> 8 + 14

Given, X = 2Put the value of x in 2x+5y=12=> 4 + 5y = 18=> 5y = 14=> y = 14/5We get x=2 and y = 14/5. Now, put the values in 4x + 5y=> 4×2 + 5×14/5=> 8 + 14=> 22