Y decreased by 25 =10
written in standard form, y decreased by 25 = 10 is y - 25 = 10Now let's solve:y - 25 = 10y = 10 + 25y = 35to check:35 - 25 = 10 so, y equals 35
Y is equal to 35. You do the opposite which is addition and add 25 and ten. Then you plug it in to make sure it's right.