6 ((((((((((((((((((((((((:
Answer:
Step-by-step explanation:
Solution by substitution method
3x+5y=7
and 4x-y=5
Suppose,
3x+5y=7→(1)
and 4x-y=5→(2)
Taking equation (2), we have
4x-y=5
⇒y=4x-5→(3)
Putting y=4x-5 in equation (1), we get
3x+5y=7
⇒3x+5(4x-5)=7
⇒3x+20x-25=7
⇒23x-25=7
⇒23x=7+25
⇒23x=32
⇒x=32/23
→(4)
Now, Putting x=32/23
in equation (3), we get
y=4x-5
⇒y=4(32/23)-5
⇒y=(128-115)/23
⇒y=13/23
∴y=13/23 and x=32/23
Answer:
-21
Step-by-step explanation:
to solve this problem,
replaced the variable x with -2
f(-2) = 10(-2) - 1
multiply 10 and -2
-20 -1
add the value of -1 and - 20
rules of integers
-21
the answer is
f( -2) = -21
The answer is x=45... hope I helped!
x/3=15
multiply each side by 3
x=45
