How to solve the equation

How to solve the equation

x-19.76=24.1 x=19.76+24.1 x=43.86

Angle A and angle B complement each other. The remainder of angle a is one seventh of angle B. find the degree of angle A and angle B

Let a = x degrees, then B = 180-x degrees
90－x＝180-x/7
630-7x=180-x
6x=450
x=75
So angle a is 75 degrees and angle B is 105 degrees

If one seventh of the sum of an angle and a 50 ° angle is equal to the remainder of a 60 ° angle, what is the angle?

Let that angle be X. then from the meaning of the question, (x + 50) / 7 = 90-60;
X = 160