We solve the system by substitution.
x = 2y + 3 4x-5y = 9
Substituting the value of x in equation no. 2 , we have,
4(2y+3) - 5y = 9
8y + 12 - 5y = 9
3y + 12 = 9
3y = 9-12 = -3
thus, 3y = -3
thus, y = -3/3 = -1
thus, y = -1
The value of y for the given **expression **will be -1.
What is an expression?
Expression in **maths **is defined as the relation of **numbers **variables and functions by using **mathematical **signs like addition, subtraction, multiplication and division.
Solve the system by substitution .
x = 2y + 3
4x-5y = 9
Substituting the **value **of x in **equation **no. 2, we have,
4(2y+3) - 5y = 9
8y + 12 - 5y = 9
3y + 12 = 9
3y = 9-12 = -3
The value of y is calculated as,
3y = -3
y = -3/3 = -1
y = -1
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The value of y is − 1 . We found this by substituting x = 2 y + 3 into the equation 4 x − 5 y = 9 , simplifying, and solving for y .
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