ngle ABC and angle CBD are complementary. The measure of angle ABC is \( 5 x+25 \). The measure of an CBD is \( x+5 \). Find the measure of angle ABC .
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To find the measure of angle ABC, we start with the information that angles ABC and CBD are complementary, meaning they add up to 90 degrees. We can set up the equation: \[ (5x + 25) + (x + 5) = 90 \] Now, simplify the equation: \[ 5x + 25 + x + 5 = 90 \] \[ 6x + 30 = 90 \] Next, subtract 30 from both sides: \[ 6x = 60 \] Now, divide by 6: \[ x = 10 \] Now, we can find the measure of angle ABC by substituting \( x = 10 \) back into the expression for angle ABC: \[ \text{Measure of angle ABC} = 5(10) + 25 = 50 + 25 = 75 \] So, the measure of angle ABC is \( 75 \) degrees.