Question

(45+30)-x=12 y-9×5=35 (90+x)-4×10=60

Answer 1

(45+30)-x=12
75 - x = 12
x = 75 - 12
x = 63

y-9×5=35
y - 45 = 35
y = 35 + 45
y = 80

(90+x)-4×10=60
90 + x - 40 = 60
50 + x = 60
x = 60 - 50
x = 10