Question

solution of x+y=10, x-y=-4 when solving by substitution method

Answer 1

eska solution upper paper me hai

Answer 2

 

Solve by Substitution x+y=10 , x-y=4

x+y=10x+y=10 , x−y=4x-y=4

Subtract yy from both sides of the equation.

x=10−yx=10-y

x−y=4x-y=4

Replace all occurrences of xx in x−y=4x-y=4 with 10−y10-y.

x=10−yx=10-y

(10−y)−y=4(10-y)-y=4

Subtract yy from −y-y.

x=10−yx=10-y

10−2y=410-2y=4

Solve for yy in the second equation.

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x=10−yx=10-y

y=3y=3

Replace all occurrences of yy in x=10−yx=10-y with 33.

x=10−(3)x=10-(3)

y=3y=3

Simplify 10−(3)10-(3).

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x=7x=7

y=3y=3

The solution to the system of equations can be represented as a point.

(7,3)(7,3)

The result can be shown in multiple forms.

Point Form:

(7,3)(7,3)

Equation Form:

x=7,y=3x=7,y=3



x+y=10,x−y=4x+y=10,x-y=4