contestada

Year 9 Maths - linear equations please help

Solve the pair of simultaneous equations:
x+y=12
y=x+6
using the substitution method to find the values of x and y.

Respuesta :

So x+(x+6)=12 x=3. y=3+6. y=9

Answer:

Step-by-step explanation:x+y=12

y=x+6

x=12-y

y=12-y+6

2y=18

y=18÷2

y=9

x+9=12

x=12-9

x=3

Otras preguntas