The GCF for 70 and 90 is 10.
Answer:
x = - 23.57 (appx)
Step-by-step explanation:




Yo sup??
x+y=4 -----1
x-y=6 ----2
adding equation 1 and 2 we get
2x=10
x=5
from equation 1 we get
5+y=4
y=-1
Since a definite value of x and y exists therefore the set of equations are consistent.
Hope this helps.