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Salsk061 [2.6K]
3 years ago
13

Systems of equations 5x+y=7 20x+2=y

Mathematics
1 answer:
saveliy_v [14]3 years ago
7 0

Step-by-step explanation:

5x+y=7

20x+2=y

put y value in first equation

5x+(20x+2)=7

25x=5

x=5

now put x value to determine y

as we know 20x+2=y

20(5)+2=y

y=102

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Answer:

All options are correct.

Step-by-step explanation:

In option (A), the given equation is

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Add 37 on both sides.

x-37+37=x-37+37

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Subtract x from both sides.

x-x=x-x

0=0

LHS=RHS for all values of x. It means equation x-37=x-37 has infinite many solutions.

Similarly.

In option (B), the given equation is

73x-37=73x-37

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LHS=RHS for all values of x. It means equation 73x-37=73x-37 has infinite many solutions.

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LHS=RHS for all values of x. It means equation 37x-37=37x-37 has infinite many solutions.

In option (D), the given equation is

74x-37=74x-37

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LHS=RHS for all values of x. It means equation 74x-37=74x-37 has infinite many solutions.

Therefore, all options are correct.

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