Answer:
z= 1/2
Step-by-step explanation:
add 3z to 7z to get z by itself
-1=1-4z
subtract one from both sides
-2=-4z
divide
z=1/2
z = 1/2
Step 1: Write equation
-3z - 1 = 1 - 7z
Step 2: Solve for <em>x</em>
Step 3: Check
<em>Plug in z to verify it's a solution.</em>
-3(1/2) - 1 = 1 - 7(1/2)
-3/2 - 1 = 1 - 7/2
-5/2 = -5/2
23 groups :)
I hope that uesful for u :)
111111 aka i dont know
5 cm = 2km
Scale= 5 cm : 200000 cm
= 1 : 40000
a. 1 : 40000 = x : 500000
x = 12.5 cm
b.1 : 40000 = 2 : x
x = 80000 cm
x = 0.8 km