Question

Resolva as equações; a) 2x+8=28 b) 3x-6=12 c) 4x+16=40 d) 5x-25=100 e) 6x-18=72 f) 9x+27=99 qual as respostas

Answer 1

2x10=20+8=28 
3x6=18-6=12
4x6=24+16=40
5x5=125-25=100
6x15=90-18=72
9x8=72+27=99