Given Equation and Point: We are given the equation y=21x+3 and the point (4,5). We need to determine if the point satisfies the equation. To do this, we will substitute the x-value of the point into the equation and see if the resulting y-value equals the y-value of the point.
Substitute x into Equation: Substitute x=4 into the equation y=21x+3.y=21×4+3
Perform Multiplication: Perform the multiplication 21×4.21×4=2
Add to 3: Add the result from Step 3 to 3. y=2+3
Calculate Sum: Calculate the sum.y=5
Compare Y-values: Compare the calculated y-value to the y-value of the point (4,5). The calculated y-value is 5, and the y-value of the point is also 5.
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