Question

Rezolvati in multimea R ecuatia:
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)

Answer 1

a)7x=21 x=3 b)3z=12 z=4 c)2,5y=18,4 y=7,36 d)-4x=7 x=1,75 e)5x-35=3x-25 2x=10 x=5 f)6z+25=5z-15 z=40

Answer 2

a) 5X+4=25-2X /-2X
=>3X+4=25
=>3X=25-4
=21
=>x=21÷3
=>x=7