How do you solve the following system?: # x +2y =-7 , -2x +2y = 4#

Answer 1

#x = 11/3#

#y = -5/3#

#x + 2y = -7 " "(1)#
#-2x + 2y = 4 " "(2)#
Subtract equation #(1)# from #(2)#
#-3x= 11#
#x= -11/3#
Substitute #x = -11/3# into equation #(1)#
#-11/3 + 2y = -7#
#2y = 11/3 -7#
#2y = -10/3#
#y= -5/3#
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Answer 2

To solve the system of equations x + 2y = -7 and -2x + 2y = 4, use the method of elimination or substitution to find the values of x and y that satisfy both equations simultaneously.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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