Y=4x-9 y=x-3 solve by substitution
2 answers:
Answer:
x=2
Step-by-step explanation:
x-3=4x-9
x=4x-6
-3x=-6
x=2
Answer:
x = 2 y = -1
Step-by-step explanation:
let y = 4x -9 .................. eqn 1
y = x - 3 ........................... eqn 2
substitute for y = x - 3 in eqn 1
we have ,
y = 4x -9.................... eqn 1
i.e
x - 3 = 4x - 9
collect the like terms
-3 + 9 = 4x - x
6 = 3x
divie both sides by 3
x = 2
now put x = 2 in equation (2)
from
y = x - 3 .............eqn 2
y = 2 - 3
y = -1
therefore x = 2 y = -1
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