Sangeetha Pulapaka
0

STEP 1:

Before you can solve, you must write a system of equations. Let x = minutes, and let y =rows.


y = 4x+8

y=5x+7


STEP 2:

Recall on how to solve the system of equations with substitution method

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Equate the equations across each other

4x + 8 = 5x + 7

x = 1

Now substitute this value of x in any one of the given equations, to find the value of y.

Plugging x = 1 in y = 4x + 8 we get y = 13

So x  = minutes = 1 and y = rows = 13.

In 1 minute, the groups will clean 13 rows each.


Skills you may want to review

https://www.purplemath.com/modules/systlin1.htm

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