First you subtract the first equation from the second one and you get:
3x + 3y = 3
x + y = 1
y = 1 - x
Then you use it on the first equation
888x + 889 (1 - x) = 890
888x + 889 - 889x = 890
-x = 1
x = -1
y = 1 - x
y = 1 - (-1) = 2
Now that you have those two numbers, we have to subtract the value of x from y:
x - y
-1 - 2 = -3
Hope this helps bro
constant acceleration- a
constant velocity- c
no velocity or acceleration- b
for body moving with a constant acceleration, the rate of change of displacement changes over time. this is proven by the increasing gradient of the curve (a) against time.
a body that is moving at constant velocity covers equal distances over equal periods of time, thus the straight line with a constant gradient c.
a stationary body covers no displacement as time elapses. thus the flat line with zero gradient.
the volume is the product of the area of the base, 3x(3x+4), and the height, 3x-1
if 888x + 889y = 890 and 891x + 892y = 893, what is the value of x - y ? <...