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3 years ago

Solve the simultaneous equations by substitution 5x+6y=−11 5x=2y−3

Mathematics

2 answers:

shusha [124]3 years ago

7 0

Answer:

y= -1, x= -1

5x+6y=-11

-(5x-2y=-3)

8y=-8

y=-8/8

y= -1

5x+6(-1)=-11

5x-6 = -11

5x=-11+6

5x=-5

x=-5/5

x=-1

kicyunya [14]3 years ago

3 0

Answer:

Step-by-step explanation:

we have

5x+6y= -11

5x-2y=-3

we will multiply first equation with -1

-5x-6y=11 and add it with the second

5x-2y=-3

-8y=8

y=-1

we go to our original equation and replace y=-1

5x-6=-11

5x=-11+6

5x=-5

x=-1

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