Question

expreçoes algebricas 99•x+4•(7-2•x)=109

Answer 1

99•x+4•(7-2x)=109
99x+28+8x=109
99x-8x=109-28
91x=81
x=81/91
x≈0.890

Answer 2

99x+4.(7-2x)=109
99x+28-8x=109
99x-8x=109-28
91x=81
x=81/91