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a fost răspuns

a) x supra 7=x+3 supra 8
b)x+3 supra 2=x-1 supra 5​

A X Supra 7x3 Supra 8bx3 Supra 2x1 Supra 5 class=

Răspuns :

EagleEyes

a) x/7 = ( x + 3 )/8

8x = 7 × ( x + 3 )

8x = 7x + 21

8x - 7x = 21

x = 21

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

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

3x + 9 = 2x - 2

3x - 2x = - 2 - 9

x = - 11

Norishor90

a)x/7=(x+3)/8

8x=7(x+3)

8x=7x+21

8x-7x=21

(8-7)x=21

1x=21

x=21

b)(x+3)/2=x-1/5

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

3x+9=2x-2

3x-2x=-2-9

(3-2)x=-11

1x=-11

x=-11

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