Question

por favor me ajudem ??????

Answer 1

a)
x+2x+12°+x+10°=90°
4x+22=90
4x=90-22
4x=68
x=68÷4
x=17°

b)
2x+11+$\frac{2x}{3}$+19=90

mmc=3

6x+33+2x+57=270
8x+90=270
8x=270-90
8x=180
x=180÷8
x=22°30'

c)
2x+25+x/2+10=180
mmc=2
4x+50+x+20=360
5x+70=360
5x=360-70
5x=290
x=290÷5
x=58°

d)
5x+60+x+180
6x+60=180
6x=180-60
6x=120
x=120÷6
x=20°