X+Y=-3, Y=2X, so
X+2X=-3
3X=-3 | /3
X=-1
Answer:
117.65%
Step-by-step explanation:
make the assumption that 646 is 100% since it is our output value.
step 2. we next represent the value we seek with x.
step 3 . from step 1 , it follows that 100%=646
step 4. in the same vein, x%=760
step 6. this gives us our pair of equations 100%=646(1)
x%=760(2)
step 6. by simply dividing equation 2 and by taking note of the fact that both the LHS (left hand side) of both equations have the some unit (%); we have 100%=646(1) and x%=760(2)2
step 7. taking the inverse (or reciprocal) of both sides yields 100%/x% = 646/760
= 117.65%
therefore , 760 is 117.65% of 646.
Answer:
A or 19/5
Step-by-step explanation:
To solve first we isolate are variables so we distubte to get -2y-2+21=3y then we add 2y to the opposite side to get -2+21=5y. Then we add -2+21 to get 19 so are equation is 19=5y. Next we just divide 19 by 5 to get y=(19/5) or option A
