Question

Rezolvati in Z ecuatiile:
a) 5•x-3=7:
b) 2(3•x-1) +3=2•1+9.
Ce observati?
a) 5.8 - 3=7 +3
58=7+3
5. =10 1:5
x=10:5
x=2
S=12}
b) 2(3•x-1) +3=2•1+9
2:3-8-2-1+3=2-1+9
68-2+3=2:879
6°8+1=2-879 |
6x+1-2•x=9
4:8+1=9
4 x=9-1
4.1=8
x=8:4
x=2
S={2}

Answer 1

Răspuns:

a)5X-3=7

5X=7+3

5x=10

x=10÷5

x=2 S={2}

b)2(3x-1)+3=2x+9

6x-2+3-2x=9

4x-2=9-3

4x-2=6

4x=6+2

4x=8

x=8÷4

x=2

S={2}