Question

ecuaciones

1) 5+m=4
2) z+4=4
3) x+5=12
4) y-6=10

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Answer 1

$5 + m = 4 \\ m = 4 - 5 \\ m = - 1$

$z + 4 = 4 \\ z = 4 - 4 \\ z = 0$

$x + 5 = 12 \\ x = 12 - 5 \\ x = 7$

$y - 6 = 10 \\ y = 10 + 6 \\ y = 16$