Three times a number s => 3s
4 times a number y => 4y
1 more than 6 times the number s => 6s + 1
The full equation would be:
3s + 4y = 6s + 1
Solve for s.
group same letter numbers and change its signs.
3s - 6s = -4y + 1
-3s = -4y + 1
solve for s. divide both sides by -3
-3s / -3 = (-4y + 1) / -3
s = (4y - 1) / 3