X-y=3 work out the value of 5(x-y)

work out the value of 2x-2y
k
work out the value of y-x

If x - y = 3

Work out the value of 5(x - y)

x - y = 3 ( Given )

5(x - y) = 5 × 3 = 15 [ as x - y = 3 ]

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If x - y = 3

Work out the value of 2x - 2y

x - y = 3 ( Given )

2x - 2y = 2(x - y) = 2 × 3 = 6 [ as x - y = 3 ]

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If x - y = 3

Work out the value of y - x

x - y = 3 ( Given )

y - x = -3 [ as x - y = 3 ]

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19

step-by-step explanation:

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is