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Aleksandr-060686 [28]
3 years ago
8

PLEASE HELP WITH 18 &19

Mathematics
1 answer:
ki77a [65]3 years ago
8 0

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

18 ) Go...

(3x - 16) + (6x + 7) = 180

Collect like terms

9x -  9 = 180

Add sides 9

9x - 9 + 9 = 180 + 9

9x = 189

Divide sides by 9

\frac{9x}{9}  =  \frac{189}{9}  \\

x = 21

_________________________________

11y - 32 = 6x + 7

11y - 32 = 6(21) + 7

11y - 32 = 126 + 7

11y - 32 = 133

Add sides 32

11y - 32 + 32 = 133 + 32

11y = 165

Divide sides by 11

\frac{11y}{11}  =  \frac{165}{11}  \\

y = 15

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

19 ) Go...

8x - 14 = 5x + 34

Add sides 14

8x - 14 + 14 = 5x + 34 + 14 \\

8x = 5x + 48

Subtract sides 5x

- 5x + 8x =  - 5x + 5x + 48

3x = 48

Divide sides by 3

\frac{3x}{3}  =  \frac{48}{3}  \\

x = 16

_________________________________

(5y + 16) + (8x - 14) = 180

5y + 16 + 8(16) - 14 = 180

5y + 16 + 128 - 14 = 180

5y + 130 = 180

Subtract sides 130

5y + 130 - 130 = 180 - 130

5y = 50

Divide sides by 5

\frac{5y}{5}  =  \frac{50}{5}  \\

y = 10

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

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