Math, asked by maliv9526, 1 month ago

the solution of the equation x-y=10 and x-y=70 is​

Answers

Answered by Anonymous
10

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GIVEN

• Equations

⟶ x - y = 10 ---------- (1)

⟶ x + y = 70 ----------(2)

FIND

⟶ The values of x and y .

SOLUTION

✓ Equations. :-

⟶ x - y = 10 ---------- (1)

⟶ x + y = 70 ----------(2)

Substracting the eq.(1) from the eq (2)

⟶ \:  \:  \:  \: x \:  +  \: y - (x - y) = 70 - 10 \\  \\ ⟶ \:  \:  \:  \:  \cancel{x}  \:   +   \: y \:  - \cancel{x} + y = 60 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \\  \\⟶ \:  \:  \:  \: 2y = 60 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \\  \\ ⟶ \:  \:  \:  \: y =  \cancel\frac{60}{2}  = 30 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:

Now we got the value of y = 30

putting the value of y in eq. (1)

⟶ \:  \:  \:  \: x - 30 = 10 \\ ⟶ \:  \:  \:  \: x = 10 + 30 \\ ⟶ \:  \:  \:  \: x = 40 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:

Now we got the value of x = 40

VERIFICATION

✓ X = 40 and Y = 30

Equation (1)

⟶ \:  \:  \:  \:  \:  \: x - y = 10 \\ ⟶ \:   \: 40 - 30 = 10 \:  \\ ⟶ \:  \:  \: 10 = 10 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:

Equation (2)

⟶ \:  \:   \:  \:  \:  \: \:  \: x + y = 70 \\ ⟶ \:  \:  \:  \: 40 + 30 = 70 \\ ⟶ \:  \:  \:  \: 70 = 70 \:  \:  \:  \:  \:  \:  \:  \:  \:

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