Answer:
X=10
Step-by-step explanation:
<span>y = kx find k
21 = k*3
k = 7
Equation:
y = 7x
Find x when y = 42
42 = 7x
x = 42/7
x = 6
answer: </span><span>x = 6 when y = 42</span>
Answer:
yx
Step-by-step explanation:
put 2 variables next to each other and it means multiply.