Question

[(328+205:5-a) :6]×3+157=337​dau coroană

Answer 1

${(328 + 41 - a) \div 6} \times 3 + 157 = 337$

Se aplică metoda mersului invers.

$(328 + 41 - a) \div 6 \times 3 = 337 - 157 \\ (328 + 41 - a) \div 6 \times 3 = 180 \\ (328 + 41 - a) \div 6 = 180 \div 3 \\ (328 + 41 - a) \div 6 = 60 \\ 328 + 41 - a = 360 \\ 369 - a = 360 \\ a = 369 - 360 \\ a = 9$