There are two ways to work this out: normal variables or using "imaginary" numbers.
Normal variables:
Imaginary numbers:
Using the result from earlier:
Now since
, then the expression becomes:
Y = x + 5....so we sub in x + 5 for y in the other equation
4x + y = 20
4x + x + 5 = 20
5x + 5 = 20
5x = 20 - 5
5x = 15
x = 15/5
x = 3
y = x + 5
y = 3 + 5
y = 8
solution is (3,8)
Answer:
answer is 10
Step-by-step explanation:
Answer:
789
Step-by-step explanation:
9+10(78)
9+10*78
9+780
789
Answer:
27.74 is the difference
Step-by-step explanation:
23.3° C - (-4.44° C)
23.3 + 4.44
27.74