मराठी

Solve the following pair of equations algebraically: 101x + 102y = 304 102x + 101y = 305 - Mathematics

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प्रश्न

Solve the following pair of equations algebraically:

101x + 102y = 304

102x + 101y = 305

बेरीज
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उत्तर

101x + 102y = 304     ....(i)

102x + 101y = 305    ....(ii)
203x + 203y = 609    ....(Add)

x + y = `609/203`

x + y = 3  .....(iii)

Subtract equation (i) from (ii),

101x + 102y = 304

102x + 101y = 305
−        −           −      
−x + y = −1             .....(iv)

Solving equations (iii) and (iv),

x + y = 3
−x + y = −1  ......(Add)
2y = 2

y = `2/2`

y = 1

Put the value y in equation (iii),

x + 1 = 3

x = 3 − 1

x = 2

∴ x = 2, y = 1

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