Explicație pas cu pas:
g + 3 024- 1350=5690
g + 1674 = 5690
g = 5690 - 1674
g = 4016
( m x 2-40 ) :23 = 12
m × 2 - 40 = 12 × 23
m × 2 - 40 = 276
m × 2 = 276 + 40
m × 2 = 316
m = 316 : 2
m = 158
(z:5-4): 3 – 260 : 2 = 1
(z:5 - 4) :3 - 130 = 1
(z : 5 - 4) : 3 = 1+130
(z : 5 - 4) : 3 = 131
z : 5 - 4 = 131× 3
z : 5 - 4 = 393
z : 5 = 393 +4
z : 5 = 397
z = 397 × 5
z = 1985