Answer:
7
Step-by-step explanation:
3 * 7 = 21
21 - 7 = 14
7*2 =14
Use the option number 5 and draw a parallel and perpendicular line across to make the slope of the lines collapse
Answer:
600
Step-by-step explanation:
x+2x=1800
3x=1800
x=600
Answer:
ㄥBEC=70;ㄥABE=160
Step-by-step explanation:
(x-5)+(3x-5)+90=180
x-5+3x-5+90=180
4x+80=180
4x=100
x=25
ㄥBEC=3*25-5=70
ㄥABE=180-(25-5)=160