-Solve each equation. Example x+3=12 9+3=12 y+9=9 10+2x=20 17+3c=26 x-4=3 2z-7=7

asked Apr 9, 2021 106k views

1 vote

-Solve each equation. Example x+3=12 9+3=12

y+9=9
10+2x=20
17+3c=26
x-4=3
2z-7=7

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1 vote

$y + 9 = 9 | - 9 \\ y+ 9 - 9 = 9 - 9 \\ y = 0$

$10 + 2x = 20 | - 10 \\ 10 + 2x - 10 = 20 - 10 \\ 2x = 10 | / 2 \\ 2x / 2 = 10 / 2 \\ x = 5$

$17 + 3c = 26 | - 17 \\ 17 + 3c - 17 = 26 - 17 \\ 3c = 9 | / 3 \\ 3c / 3 = 9 / 3 \\ c = 3$

$x - 4 = 3 | + 4 \\ x - 4 + 4 = 3 + 4 \\ x = 7$

$2z - 7 = 7 | + 7 \\ 2z - 7 + 7 = 7 + 7 \\ 2z = 14 | / 2 \\ 2z / 2 = 14 / 2 \\ z = 7$

Fuji answered Apr 14, 2021

by Fuji

5.4k points

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