Question

Va rog ajutatima la aceste 2 ecuatii!!!

Answer 1

a)(5x-32):4=17
5x-32=17·4
5x-32=68
5x=68+32
5x=100
x=100:5
x=20
S={20}

b)(z:9)·15-47=28
(z:9)·15=28+47
(z:9)·15=75
z:9=75:15
z:9=5
z=5·9
z=45
S={45}

Answer 2

Bună! ;)
a) (5x-32):4=17
5x-32=17×4
5x-32=68
5x=68+32
5x=100
x=100:5
x=20

b) (z:9)×15-47=28
(z:9)×15=28+47
(z:9)×15=75
z:9=75:15
z:9=5
z=9×5
z=45

Sper că te-am ajutat! :)