Find the coordinates of the intersection point of the graphs of the linear function y = -2x + 3 and y = 2x-5.
August 8, 2021 | education
| In order to find the coordinates of the point of intersection of the lines y = -2x + 3 and y = 2x – 5, which are given by the equations, without performing the construction, we will solve the system of these equations.
System of equations:
y = -2x + 3;
y = 2x – 5.
We will solve the system using the substitution method. Substitute the expression 2x – 5 in the first equation for y.
System of equations:
2x – 5 = -2x + 3;
y = 2x – 5.
We solve the first equation of the system and get:
2x + 2x = 3 + 5;
4x = 8;
x = 8: 4;
x = 2.
System of equations:
x = 2;
y = 2x – 5 = 2 * 2 – 5 = 4 – 5 = -1.
Answer: (2; -1).
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