Question

va rog frumos ajutatima .....
multumesc♥
a)5x+4=25-2x
b)2z-4=8-z
c)6,5y-15=4y+3,4
d)3x-35=7x-28
e)5(x-7)=3(x-4)-13
f)3(2z+7)+4=5(z-3)
g)-2x=3(x-5)+6

Answer 1

a) 5x + 2x = 25 - 4

7x = 21

x = 3

b) 2z + z = 8 + 4

3x = 12

z = 4

c) 6,5y - 4y = 3,4 + 15

2,5y = 18.4

y=7,36

d)3x - 7x = -28 + 35

-4x = 7

x = -7/4

e) 5x - 35 = 3x - 12 -13

5x - 3x = -25 + 35

2x = 10

x = 5

f) 6z + 21 + 4 = 5z - 15

6z - 5z =  -15 -40

z = -55

g) -2x = 3x - 15 +6

-2x - 3x =  -15 +6

-5x= -7

x = 7/5