Plz help two sums in photo

Answers
Answer:
(15z-21) -(18z-22) =(32z-42)-17
15z-21-18z+22=32z-42-17
-3z+1=32z-59
-3z-32z=-59-1
-35z=-60
z=12/7
please make me Brainliest
Answer:
part a . solution 15z-21-18z+22=32z-52-17 15z-18z-32z=-52-17-22+21 -65z=-70 z=-70/-65 z=1 whole 1/13 or 1.076 part b solution hari : harry 5 : 7 5*3 : 7*4 15 : 21 answer Step-by-step explanation: part a. explanation
first multiply and open the brackets. then combine like terms(numbers with same variables) in this question there is a minus sign which means we will add the numbers but we will write the sign of the greatest value which is minus . now we have -65 on left side and -70 on right side .to make both sides equal we will divide -65 by -70 and the answer will be 1 whole 1/13 or 1.076 part b. explanation simply multiply the ages given in question. request please mark me as brainliest.