5x-4y=19
x+2y=8
solve the simultaneous equation

x= 5, y = 1.5

Step-by-step explanation:

to solve the equation simultaneously using substitution method we say that let

5x-4y=19 equation 1

x+2y=8 equation2

from equation 2

x+2y=8 equation2

x = 8-2y equation 3

subtitute for x = 8-2y in equation 1

5x-4y=19 equation 1

5(8-2y) -4y = 19

40 -10y -4y =19

collect the like terms

40 -19 = 10y + 4y

21= 14y

divide both sides by 14

21/14 = 14y/14

1.5 = y

therefore y= 1.5

put y=1.5 in equation 3

x = 8-2y equation 3

x = 8 - 2(1.5)

x = 8 -3

x = 5

therefore x= 5, y = 1.5

Step-by-step explanation:

Given Equations:

  Equation:1

or,          Equation:2

Using Substitution Method, putting the value of 'x' in equation:1

Subtracting '40' both side:

Putting the value 'y' in Equation 2 to get the value of 'x':

The values are:   and

x is variable or an unknown value to find

example:

2x = 5 which means x = 3

42

step-by-step explanation:

256/6=42