Question

. Substitution method 7x - 2y = 5 8x+7y=15​

Answer 1

Answer:

x = 5.17

x = 5.17y = 2.23

Step-by-step explanation:

7x - 2y = 5

8x + 7y = 15

From first equation

$x = \frac{2y + 5}{7}$

putting

$x = \frac{2y + 5}{7}$

in equation 2 we get

$8 \times (\frac{2y + 5}{7}) + 7y = 15$

so y = 2.23

putting y= 2.23 in equation(iii)

we get x = 5.17