Question

Află termenul necunoscut : x÷3+199×4=6×155 ; 80+(64÷a+9)×6×5=380 ; 800-702-(86+x÷4)=3

Answer 1

Răspuns:

x:3+796=930

x:3=930-796

x:3=134

x=134x3

x=402

80+(64:a+9)x30=380

(64:a+9)x30=380-80

(64:a+9)x30=300

64:a+9=300:30

64:a+9=10

64:a=10-9

64:a=1

a=64:1

a=64

800-702-(86+x:4)=3

98-(86+x:4)=3

98-3=86+x:4

95=86+x:4

95-86=x:4

9=x:4

x=9x4

x=36