Question

12y=144
40b=400
35y=70
100y=1000
2x+4x=60​

Answer 1

$12y = 144 \\ y = 144 \div 12 \\ y = 12 \\ \\ 40b = 400 \\ b = 400 \div 40 \\ b = 10$

$35y = 70 \\ y = 70 \div 35 \\ y = 2 \\ \\ 100y = 1000 \\ y = 1000 \div 100 \\ y = 10$

$2x + 4x = 60 \\ 6x = 60 \\ x = 60 \div 6 \\ x = 10$