Answer: 35 42 49 56 63 70
Step-by-step explanation:
Formula: S= X3-X2
X1=?
X2=42
X3=49
X4=?
X5=63
X6=?
SOLUTION: S=49-42=7
X1=X2-S= 42-7=35
X4=X3+S=49+7=56
X6=X5+S=63+7=70