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I am Lyosha [343]
3 years ago
5

6x-3y=6 y=2x+5 USE SUBSTITUTION SHOW YOUR WORK

Mathematics
2 answers:
Masja [62]3 years ago
6 0
6x - 3y = 6 ⇒ 6x - 3y = 6 ⇒ 6x - 3y = 5
 y = 2x + 5 ⇒ 2x - 1y = 5 ⇒<u> 6x - 3y = 15</u>
                                                  -<u>6y</u> = <u>-10</u>
                                                   -6      -6
                                                     y = 1 2/3
                                   6x - 3(1 2/3) = 6
                                             6x - 5 = 6
                                             <u>     +5  +5</u>
                                                   <u>6x</u> = <u>1</u>
                                                    6     6
                                                     x = 1/6
                                               (x, y) = (1/6, 1 2/3)
mote1985 [20]3 years ago
3 0
What you're going to do is plug in y=2x+5 into the 3y ( getting rid of the y to solve for x only) so that gives you...... 6x-3(2x+5)=6. Next, you're going to multiply -3 to 2x and 5. Now it gives you..... 6x-6x-15=6. The x's cancel out leaving the equation with -15=6 making it an Inconsistent system also known as a No Solution system. 
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