5x+9y=-1, 2x+9y=3 elimination
Answers
Answer:
5x+9y=-1 (1)
2x+9y=3 (2)
Step 1
Check whether the coefficient of either if the variables is the same or not.
In this case it is.
In case it us not multiply both the numbers of the same variable with a common number.
Step 2
Check whether the signs of the same numbers of the same variable are opposite or not.
In thus case it is not.
So we change the signs of all the numbers and make it opposite.
5x+9y=-1
2x+9y=3
- - - (Since all the numbers are
positive we make all of it
negative)
Step 3
Find out the value of x
=> 5x+9y=-1
2x+9y=3
- - -
=> 3x=-4
=> x= -4/3
Step 4
Replace x in any one of the equations.
In this case
Replacing x in equation (2)
2x + 9y = 3
2 (4/3) + 9y = 3
8/3 + 9y = 3
9y = 3 - 8/3
9y = (9-8) /3 (Taking LCM)
9y = 1/3
y = (1/3) * (1/9)
y = 1/27
Therefore,
x= -4/3
y= 1/27
Answer:
Love Me??? Follow me!!! Mark me Brainliest!!! Thank me!!!!
Ans: The similarities in properties of materials is the basis for the grouping of materials. The simillarties in properties like colour, size and shape are important properties of a matter based on which materials grouped easily. The similarities in properties of materials is the basis for the grouping of materials.