Question

решить уравнение y:12=42+58

Answer 1

$y \div 12 = 42 + 58 \\ y \div 12 = 100 \\ y = 100 \times 12 \\ y = 1200$

Answer 2

у: 12=100
у=100×12
у=1200
__________
1200: 12=42+58
100=100