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156÷13+7×{8+5 [39-6×(1707-63×27)]}-84

Răspuns :

156÷13+7×{8+5 [39-6×(1707-63×27)]}-84 = 12+7x{8+5[39-6x(1707-1701)]}-84= 12+7x[8+5(39-6x6)]-84 = 12+7x[8+5x(39-36)]-84 = 12+7x(8+5x3)-84 = 12+7x(8+15)-84 = 12+7x23-84= 12+161-84 = 183-84= 99

156 : 13 + 7x{8+5[39 - 6x(1707-63x27)]} -84

12 + 7x{8+5[39-6x(1707-1701)]} -84

7x{8+5[39-6x6]} -84+12

7x{8+5x3} -72

7x{8+15} - 72=7x 23 - 72=161-72=89