Question

Given that R = 3 x + 2 y Find x when y = 7 and R = 8

Answer 1

Answer:

x = -2

Step-by-step explanation:

Given,

R = 8

y = 7

Since ,

R = 3x + 2y

=> 8 = 3x + 2× 7

=> 8 = 3x + 14

=> -3x = 14-8

=> -3x = 6

=> x = 6/ -3

=> x = -2

Answer 2

Answer:

The value of x = -2

Step-by-step explanation:

$R = 3x + 2y$

given:

R = 8

y = 7

now on putting the values:

$8 = 3x + 2 \times 7 \\ 8 - 14 = 3x \\ - 6 = 3x$

$x = \frac{ - 6}{3} \\ x = - 2$

hope it help