Question

Va rog ajutati-ma la mate

Answer 1

a) 5x=6
x=6/5
b) -3x= -2
x=2/3
c) -9x= -18
x=18/9
x=2
d) 5x=20
x=20/5
x=4
e) √5x= -2√5
x= -2√5/√5
x= -2
f) 3x-√2= -1
3x= -1+√2
x=(-1+√2)/3
g) √2x-3√2+2√2=0
√2x-√2=0
√2x=√2
x=1
h) (5-√7)x-5=√7
(5-√7)x=√7+5
x=(5+√7)/(5-√7) rationalizam cu 5+√7
x=(25+10√7+7)/(25-7)
x=(32+10√7)/18
x=2(16+5√7)/18
x=(16+5√7)/9
i) x√2=√3
x=√3/√2 rationalizam cu √2
x=√6/2