Question

resolva as equações:
4a - 7 =5
50+12=21
2y+18=12
9y-20=-38
10x-2=7
13×+46=60​

Answer 1

Resposta:

$4a-7=5\\4a=5+7\\a=12/4=3\\\\2y+18=12\\2y=12-18\\y=-6/2=-3\\\\9y-20=-38\\9y=-38+20\\y=-18/9=-2\\\\10x-2=7\\10x=7+2\\x=9/10=0.9\\\\13x+46=60\\13x=60-46\\x=14/13$