Question

x+3=9
x-5=10
x×2=4
5x+11=66
3×+9=0
3x-9=5x-23
xla puterea 2-3x-10=0
x la a 2+x+1=0
rpd
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Answer 1

Răspuns:

X=6

X=15

X=2

X=11

X=-3

X=7

Answer 2

Răspuns:

x+3=9

x=9-3

x=6

x-5=10

x=10+5

x=5

x×2=4

×=4÷2

x=2

5x+11=66

5x=66-11

5x=55

x=55÷5

x=11

3x+9=0

3x=0-9

3x=-9

x=-9÷3

x=-3

3x-9=5x-23

3x-5x-9=-23

3x-5x=-23+9

-2x=-14

x=-14÷(-2)

x=7

x²-3x-10=0

x²+2x-2x-5x-10=0

x×(x+2)-5x-10=0

x×(x+2)-5(x+2)=0

(x+2)×(x+5)=0

x+2=0

x-5=0

x=-2

x-5=0

x=-2

x=5