Question

3x+2y=4
5x+y=2
linear graphs and simultaneous linear equation
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Answer 1

Answer:

x= -12

y= 30

Step-by-step explanation:

3x+2y= 4-(i) equation

5x+y= 2-(ii)equation

3x= 4-2y

x = 4-2y/3 - (i)equation

5x+y=2

5x= 2-y

x= 2- y/5 -(ii)equation

both equation (i) and (ii)

4-2y/3+2-y/5

= 5(4-2y)+3(2-y)/15

= 20-10y+6+3y/15

= -10y+3y+6-20/15

= -7y-14/15

= -7y=-14×15

= y = -14×15/-7

= y = 30

3x+2y=4

= 3x+2×30=4

= 3x+60=4

= 3x= 4-60

= x= -36/3

=x = -12