Answer:
The first equation must be multiplied by -5 to eliminate x variable by addition
Step-by-step explanation:
4 x - 3 y = 1 (1)
5 x + 4 y = 9 (2)
If the second equation is multiplied by 4
5x+4y=9. ×4
We have,
20x+16y=36 (3)
The first equation should be multiplied by -5 to eliminate x variable by addition
4x-3y=1 × -5
We have
-20x+15y=-5 (4)
Add equation (3) and (4) to eliminate x variable
20x+16y=36
-20x+15y=-5
31y=31
Divide both sides by 31
y=1
Substitute y=1 into equation (1)
4 x - 3 y = 1
4x-3(1)=1
4x-3=1
4x=1+3
4x=4
Divide both sides by 4
x=1
Hello!
The sum of a number and 11:
Let's say that the number is x. So the expression "the sum of a number and x" looks like this:
x+11
Hope this helps you!
~Just an emotional teen who listens to her favourite songs
Answer:
13 = 13
Step-by-step explanation:
13 is a prime, so 13 is its only prime factor.
Answer:8 hours on Tuesday
Step-by-step explanation:13.50 x 4=54
162-54=108
108÷13.50=8
Answer:
Step-by-step explanation:
1 litre = 1000 ml
water : Sucrose : Saline = 1000 : 269 : 61
This is simplest form. We cannot reduce this as 61 is a prime number and 1000; 269 will not come in 61th table or
We can say 100 ; 269 ; 61 don't have common term
