4×a-5×3+5×c+d:6=4×20-15+5×122+46:6
80-15+610+8=65+618=683
Explicație pas cu pas:
a = (9000-75÷5-8905)÷4
= (9000-15-8905)÷4
= (8985-8905)÷4
= 80÷4=20
b = 76×8×(2987-2986)-575
= 608×1-575=608-575=33
c = 3000-(48×7-85÷5)-2669
= 3000-(336-17)-2669=3000-319-2669=
= 2791-2669=122
d = 76÷4+45×4+9÷9-164
= 19+180+1-164=199+1-164=200-164=46