Please tell me the number four and five instructions are solve the system of simultaneously equation by using the substitution m
ethod 100 points please help
2 answers:
Answer:
1) x = 2 and y = -2
2) x = 6 and y = 5
3) x = 2 and y = -4
Step-by-step explanation:
1) 3x + y = 4
since y = -x subtitute it in the equation
3x + (-x) = 4
3x - x = 4
2x = 4
x = 4\2
x = 2
y = -2
2) 4x - y = 19
since y = x - 1 subtitute it in the equation
4x - (x - 1) = 19
4x - x + 1 = 19
3x = 19 - 1
3x = 18
x = 18\3
x = 6
y = 6 - 1 = 5
3) y = 3x - 10
y - 3x = -10
since 2x + y = 0
thus y = -2x subtitute in equation
-2x - 3x = -10
-5x = -10
x = -10\-5
x = 2
y = -2 * 2 = -4
4. 3x+(-x)=4
3x-x=4
2x=4
x=4/2
answers:
x=2
y=-2
5.
y=x-1
4x-y=19
-x+y=-1
4x-y(cross the y’s out they cancel eachother)=19
3x=18
x=6
-6+y=-1
y=-1+6
y=5
answers:
x=6
y=5
You might be interested in
Once you solve for z, you will get z = -1/y + w/xy. :)
Answer:
See explaination and attachment
Step-by-step explanation:
Please kindly check attachment for the step by step solution of the given problem.
I have the detailed answer as an attachment.
Answer:
(x-1)(x+7)
Step-by-step explanation:
x = 1
x = -7
These are the roots found using the quadratic formula.
The answer is 452.39 centimeters
-1(5x+1)
-5x-1
the (-) in front is just a short way to put (-1)