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Bond [772]
3 years ago
9

Solve by substitution 4x=y-1 6x-2y=-3

Mathematics
1 answer:
leva [86]3 years ago
8 0
4x = y - 1     ⇒ 4x + y = -1   ⇒  12x + 3y = -3
6x - 2y = -3  ⇒ 6x - 2y = -3 ⇒  <u>12x -  4y = -6</u>
                                                            <u>7y</u> = <u>3</u>
                                                             7     7
                                                             y = 3/7
                                            12x + 3(3/7) = -3
                                             12x + 1 3/7 = -3
                                             <u>         -1 2/7    -1 2/7</u>
                                                          <u>12x</u> = <u>-4 2/7</u>
                                                           12        12
                                                               x = -5/14
                                                         (x, y) = (-5/14, 3/7)
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