## Answers

the straight line passes through two points (0, -3 ) and (7,0).

#### Explanation:

3x - 7y =21 is a linear simultaneous equation. For each value of x, there will be different value of y.

when x =o,

3 X 0 - 7 X y = 21

or, o - 7y = 21

or, -7y = 21

or -7y/-7 = 21/-7

or, y = -3

similarly for y = 0,

3x - 7 X0 = 21

or, 3x =21

or, 3x/3 = 21/3

or, x = 7

Hence the straight line passes through two points (0, -3 ) and (7,0).

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