6x - 5y = 17
7x + 3y = 11
to eliminate x....there is a couple ways to do this...
u can multiply equation 1 by 7 and equation 2 by -6
or
u can multiply equation 1 by -7 and equation 2 by 6
Answer:

Step-by-step explanation:
The equations of lines are :
y=4x-5 and y=ax+2
From above equations,
4x-5 = ax+2
4x-ax = 5+2
4x-7 = ax

So, the value of a is equal to
.
147 is not a prime number 147= 49 * 3
49 is divisable by 7: 49= 7 * 7
7 is not divisable by anything