please solve with working much appreciated

Answer:x°= 55°Step-by-step explanation:First, find the degrees of the larger triangle.Since every triangle equals 180° degrees, make an equation.60°+90°+a°= 180°Now, add the degrees together.120°+a°= 180°Then subtract from both sides. 120°+a°= 180°-120 °      -120°a°= 60°Now that you know the sum of all the angles, subtract 25° from 60°(which is the measure of a).60°-25°= 35°Now that we have the measurement of the angle from the smaller triangle inside the larger one, make an equation.35°+90°+x°= 180°Then, add the degrees.125°+x°= 180°Subtract from both sides of the equation to get the answer for the variable. 125°+x°= 180°-125°       -125°x°= 55°