Isolate x in 2nd equation...
-x - 2y = -10 ....add 2y to both sides
-x = 2y - 10 ...multiply by -1 to make x positive
x = -2y + 10 <== u would sub in -2y + 10 in for x in the 1st equation
To find, the length, divide the area by the width:
Length = 20 / 4 = 5 meters.
Answer:
The answer to your question is 4
The sum of twice a number and 6 is 4.
