[tex](12 - 2) \times (3 + 1) \\ 10 \times 4 = 40[/tex]
[tex]12 - 2 \times 3 + 1 \\ 12 - 6 + 1 \\ 6 + 1 = 7[/tex]
[tex]12 - 2 \times 3 + 1 = 4 \\ 12 - 2 \times (3 + 1) = 4 \\ 12 - 2 \times 4 = 4 \\ 12 - 8 = 4 \\ 4 = 4[/tex]
[tex]55 - 12 = 43[/tex]
x + 7 = 43
x = 43 - 7
x = 36
Chris has 36
