SG chevron_right Primary 3 chevron_right Number and Algebra

Alice and Mary had an equal number of stamps.  After Alice bought another 28 stamps and Mary lost 12 stamps.  Alice had twice as many stamps as Mary. How many stamps did Alice have at first?

SG chevron_right Primary 5 chevron_right Number and Algebra

SG chevron_right Secondary 1 chevron_right Add Math: Algebra

SG chevron_right Secondary 1 chevron_right Add Math: Algebra

SG chevron_right Primary 3 chevron_right Number and Algebra

Please help me.Thank you!