Решите уравнение 2,3у+31+2,5у=67

Question

Решите уравнение
2,3у+31+2,5у=67

Answer 1

4,8y+31=67
4,8y=67-31
4,8y=36
y=36÷4,8
y=7,5
______
2,3×7,5+31+2,5×7,5=67
17,25+31+18,75=67
67=67

Answer 2

2,3y+31+2,5y=67
2,3y+2,5y=67-31
4,8y=36
y=36:4,8
y=7,5