Question

29) Află termenul necunoscut: a) a +372 x 4 = 1500; 562 × 5+ b = 4200; c+ 400 × 3 = 1500; b) 250 x 3-x = 500; 285 × 2 + y = 1200; 512 × 3-z = 978; c) t-450 × 3 = 45; p - 1250 × 6 = 2000; m - 560 × 8 = 2521.​

Answer 1

Explicație pas cu pas:

a ) a + 372 ×4 = 1500

a= 372 ×4 =1488

a= 1500 - 1488

a= 12

562 × 5 + b= 4200

b= 562 × 5 = 2810

b= 4200-2810

b= 1390

c+ 400 ×3 =1500

c= 400 ×3 = 1200

c= 1500 - 1200

c= 300

b ) 250 × 3 - x = 500

x= 250 x 3 = 750

x= 750 - 500

x= 250

285× 2 + y = 1200

y= 285 × 2 = 570

y= 1200 - 570

y = 630

512 ×3 - z = 978

z= 512 × 3 = 1536

z= 1536 - 978

z= 558