Problemas de ecuaciones para estudiantes de primaria

(1) 3× 2 χ-50 = 70, (4), (1) 3× 3 χ 2× (10-χ) = 48,

(2) 4×6χ 30 = 150, (2) (2χ-15)-5 = 31,

(3) 2×(χ 8) = 28, (3) 4×(25-2χ)-2×3χ = 16,

(4) 5×(28-2χ) = 80, (4) 500 (100-5χ)×3 = 530,

(5) 4×(3χ 6) = 156, (5) 600-5×(2χ 60) = 120,

(6) (64-3χ)×8 = 32, (6) 6×2χ 15×(15-2χ) = 45,

(7) (10χ-90)×3 = 120, (7) 4×5χ-(3χ-24)×10 = 10,

(8) ( 9χ 15)×4 = 276, (8) 1000 (5χ-260)×12 = 220,

(9) 3×(56-2χ) χ = 103, (9) (18-5χ )×2 125 = 21,

(10) (3χ 5)×4-38 = 174, (10) 3×(4χ-25)-100 = 53,

(11) 200 (85 2χ) = 325, (11) 200-(3χ-50)×3 = 53,

(12) 344-(135 3χ) =146, (12) 100 ( 120-4χ)×2 = 60,

(13) 5χ (100-χ) = 196, (13) 580 (5χ 40)×4 = 800,

(14 ) 7χ-(35-χ) = 235, (14) 330-3×(100 — 2χ) = 276,

(15) 10χ (196-7χ) = 364, (15) (28 -4χ)×5 6χ×3 = 0,

(16) 375-(5χ 143) = 107, (16) 2000-(8χ 500)×2 = 20×6,

(17) 437-(529-3χ) = 142, (17) 24 (9χ 10)×10-50χ = 4×56.