Răspuns :
25x(207-125)+a=307.025
25 x 82 + a = 307,025
2050 + a = 307,025
a = 307,025 - 2050
a = - 1742,975
25x(207-125)+a=307025
25 x 82 + a = 307025
2050 + a = 307025
a = 307025 - 2050
a = 304975
25×(207-125) + a = 307.025
25×207-125×25 + a = 307.025
a = 307025 - 5175 + 3125
a = 301850 + 3125
a = 304975
sau
25 × (207 - 125) + a = 307.025
25 × 82 + a = 307025
2050 + a = 307025
a = 307025 – 2050
a = 304975