answersLogoWhite

0

x=7 look at the bottom for the reason:

First, when a number and a variable are placed next to each other it means to multiply the 2. (example- what is 3x if x=7 ? Well, 3x7=21 so, 3x=21)

so, 5x + 2x + 3x + 10x = 140

20x = 140

40/20 = 7 so,

(5x7) + (2x7) + (3x7) + (10x7) = 140 so,

35 + 14 + 21 + 70 = 140

User Avatar

Wiki User

14y ago

What else can I help you with?