write the linear equation y-7=0 as a linear equation in two variable
Answers
Answer:
Hey there !
Solution:
Correction: It is -1 and not +1
Q1. Given Equation : x ( x - 1 ) - x + y + 7 = 0
Simplifying the equation we get,
=> x² - x - x + y + 7 = 0
=> x² -2x + y = -7
Since the highest degree of this equation is 2, it is a quadratic equation and not a linear equation.
Q2. So according to the question, Rs. 500 is a fixed cost. Also the remaining amount of extra milk taken is denoted as Rs. 20 per liter.
Total Expenditure = 500 + 20 ( x ) where x denotes the amount of milk bought in liters.
=> According to the new situation, Total Expenditure is 'y' and number of liters is x. So the equation would be:
500 + 20 ( x ) = y
=> 500 + 20x = y
=> 500 = y - 20x
Hence the linear equation is: \boxed{ -20x + y = 500}
−20x+y=500
Refer to the attachment for graph !
Hope it helped !
Answer:
y=7
Step-by-step explanation:
y-7=0
y=0+7
y=7
Further explanation:
y is unknown to us. To find the value of y, we have to do the rest of the equation. So, when -7 is transposed to the other side of the equal sign, the sign changes from negative to positive. That's why -7 changes to +7 after shifting. Now, 0+7 = 7. So, y = 7.
It is really simple if you try to understand