# How do you solve 4x – 5y = 14 and -12x + 15y = -42 using substitution?

May 6, 2018

we cannot solve by substitution

#### Explanation:

show below

4x – 5y = 14 .......(1)

$- 12 x + 15 y = - 42$.......(2)

divide the equation 2 by -3

$4 x - 5 y = 14$....(2)

note (1) equal to (2)

so, we cannot solve by substitution