Question

Afla nr necunoscut din egalitatiele urmatoare: a) m+7x4=42 b) n-3x8=24 c) 9x8-p=12 d) q-(100-93)x7=40 e) 8x7+7x2-r=25 f) (18+16:2+14):i=5

Answer 1

Răspuns:

a). m=42-28=14

b). n=24+24=48

c). 72-12=p

p=60

d). q-7x7=40

q=40+49=89

e). 56+14-r=25

70-r=25

70-25=r

r=45

f). (18+8+14):i=5

40:i=5

i=8

Answer 2

Explicație pas cu pas:

a)m+7×4=42

m+28=42

m=42-28

m=14

v:14+7×4=14+28=42

b)n-3×8=24

n-24=24

n=24+24

n=48

v:48-3×8=48-24=24

c)9×8-p=12

72-p=12

p=72-12

p=60

v:9×8-60=72-60=12

d)q-(100-93)×7=40

q-7×7=40

q-49=40

q=40+49

q=89

v:89-(100-93)×7=

89-7×7=

89-49=

40

e)8×7+7×2-r=25

56+14-r=25

70-r=25

r=70-25

r=45

v:8×7+7×2-45=

56+14-45=

70-45=

25

f)(18+16:2+14):i=5

( 18+8+14):i=5

( 26+14):i=5

40:i=5

i=40:5

i=8

v:(18+16:2+14):8=

(18+8+14):8=

( 26+14):8=

40:8=

5