Respuesta :
Solve for yy in 2x+y=202x+y=20How?
y=20-2xy=20−2x
Substitute y=20-2xy=20−2x into -5y=-6x+12−5y=−6x+12How?
-5(20-2x)=-6x+12−5(20−2x)=−6x+12
Solve for xx in -5(20-2x)=-6x+12−5(20−2x)=−6x+12How?
x=7x=7
Substitute x=7x=7 into y=20-2xy=20−2xHow?
y=6y=6
Therefore,
x=7x=7
y=6y=6
Answer:
x=7 and y=6
Explanation:
We have been given with the equation 2x+y=20 (1)
And -5y = -6x+12 it can be written as -5y+6x=12 (2)
Now we can get the value of y in terms of x from equation (1) we get y = 20-2x
Now substitute y =20-2x in equation (2)
we will get -5(20 -2x)+6x=12 after simplifying we will get
-100 +10x +6x=12
On further simplification 16x =112 then we will get
x=7
Now substitute x=7 in equation y = 20-2x
y = 20 -2(7)
y=6
Hence, x=7 and y =6
