Question

Tony is 3 years older than Marie. This can be modeled with the following equation

Answer 1

`\small \sf \: M = { \fbox { \green{T} } } - 3`

Explanation:

T = M + 3

Swap the sides of of equations .

M + 3 = T

subtract 3 from both side

M + 3 - 3 = T - 3

M = T - 3

Answer 2

M = T - 3

Explanation:

Given

T = M + 3 ( subtract 3 from both sides )

T - 3 = M , that is

M = T - 3