If x 1 2 16 8y then x
Asked by maham237 @ in Mathematics viewed by 319 People
-2x = 16–8y
x+4y= 25
Solve by substitution
Asked by maham237 @ in Mathematics viewed by 319 People
-2x = 16–8y
x+4y= 25
Solve by substitution
Answered by maham237 @
Answer:
(,
Step-by-step explanation:
Given the 2 equations
- 2x = 16 - 8y → (1)
x + 4y = 25 → (2)
Rearrange (2) expressing x in terms of y by subtracting 4y from both sides
x = 25 - 4y → (3)
Substitute x = 25 - 4y into (1)
- 2 (25 - 4y) = 16 - 8y ← distribute left side
- 50 + 8y = 16 - 8y ( add 8y to both sides )
- 50 + 16y = 16 ( add 50 to both sides )
16y = 66 ( divide both sides by 16 )
y = =
Substitute this value into (3) for corresponding value of x
x = 25 - 4 × )
= - =
Solution is ( , )
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