Question

Rezolvaţi ecuaţiile: a.(4x-32)÷4=17 b.92+56÷(14-y)=100
c.(z÷9)×15-47=28
d.(410-t)÷7+70=120
vă rog urgent

Answer 1

a)   ( 4 x - 32 ) : 4 = 17

4 x - 32 = 17 × 4

4 x - 32 = 68

4 x = 68 + 32

4 x = 100

x = 100 : 4

x = 25

________________

b)  92 + 56 : ( 14 - y ) = 100

56 : ( 14 - y ) = 100 - 92

56 : ( 14 - y ) = 8

14 - y = 56 : 8

14 - y = 7

y = 14 - 7

y = 7

________

c)   ( z : 9 ) × 15 - 47 = 28

( z : 9 ) × 15 = 28 + 47

z : 9 = 75 : 15

z : 9 = 5

z = 5 × 9

z = 45

______________

d)   ( 410 - t ) : 7 + 70 = 120

( 410 - t ) : 7 = 120 - 70

410 - t = 50 × 7

410 - t = 350

t = 410 - 350

t = 60