Choose the true equation.
a. 7 + 6 = _ +5 is 13
b. 9 + 3 = _ +7 is 19
c. 13 + _ = 20 is 7
d. 12 x 10 = 120 + 5 = 125 - 25 = 100
a. 7 + 6 = _ +5 is 13
b. 9 + 3 = _ +7 is 19
c. 13 + _ = 20 is 7
d. 12 x 10 = 120 + 5 = 125 - 25 = 100