Question

Va rog urgent ex 7 rapidd

Answer 1

Răspuns:

7. a)946+17-x=251

963-x=251

x=963-251

x=714

b)y-129+483=824

y-612=824

y=824-612

y=212

c)405-z+244=382

405-z=382-244

405-z=142

z=405-142

z=263

d)176-u×(15-4×3)+327=488

176-u×(15-12)+327=488

176-u×3+327=488

176-u×3=488-327

176-u×3=161

u×3=176-161

u×3=15

u=15:3

u=5

e)3×(a×7-3×8)+507-473=46

3×(a×7-24)+507-473=46

3×(a×7-24)+507=473+46

3×(a×7-24)+507=519

3×(a×7-24)=519-507

3×(a×7-24)=12

a×7-24=12:3

a×7-24=4

a×7=24+4

a×7=28

a=28:7

a=4

f)947-153-8×(25-6×v)=738

153-8×(25-6×v)=947-738

153-8×(25-6×v)=909

8×(25-6×v)=909-153

8×(25-6×v)= 756

25-6×v=756:8

25-6×v=94,5

6×v=94,5 -25

6×v=69,5

v=69,5:6

v=11,58(3)

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