Answer:
Step-by-step explanation:
3x-20=x+40
2x=60
x=30, then
y+x+40=180, knowing x=30
y+30+40=180
y+70=180
y=110
First of all, recall that 1.5m is the same as 150cm.
Now, we simply build a proportion where we consider 48 to be 100, and wonder what 150 will be:
Solving for x, we have
Which actually makes sense, because we're stating that 1.5m is about 300% of 48cm, which means three times as much. Which is true, because three times 48cm means 144cm, which is about 1.5m
For example:
1 1/2 × 4 4/7
1×2+1/2 × 4×7+4
3/2 × 32/7
96/14
477900 there you go use a calculator next time ;)