Equation 1) y=2x
Equation 2) y=x + 1
Rearrange the equations so that x and y are on the same side.
1) -2x+y=0
2) -x+y=1
Subtract equations with each other.
Now you have: -x=-1
x=1
Plug in x.
y=2(1)
y=2
(1,2)
~Hope I helped!~
Answer: 14
Step-by-step explanation:
29-15=14
Let me know if I helped :D
<h2>Решение (а):</h2>
Чтобы найти значение x, воспользуемся перекрестным умножением.
Что значит ,
= 2 × 30 = 5 × х
= 2 × 30 = 5x
= 60 = 5x
= х = 60 ÷ 5
= х = 12
Следовательно, 2/5 = 12/30.
<h2> Решение (б):</h2>
Чтобы найти значение x, воспользуемся перекрестным умножением.
Что значит ,
= 30 × 8 = 48 × х
= 30 × 8 = 48x
= 240 = 48x
= х = 240 ÷ 48
= х = 5
Следовательно, 5/8 = 30/48 .
2(3x + 9) = 8x - 4
6x + 18 = 8x - 4
22 = 2x
11 = x
Answer:
Step-by-step explanation:
Let's substitute the first equation into the second one.
- Multiply by and bring all the terms to one side.
I'll use my graphical calculator to solve this but you could factor:
(All rounded to 2 decimal places)
Now we can substitute these values into an equation for .