12.4x-7.8x = 23 5 (x-1.9) = 10.5 3x-2.6x = 0.25 times 2

12.4x-7.8x=23
4.6x=23
x=23÷4.6
x=5
5(x-1.9)=10.5
5x-9.5=10.5
5x=20
x=4
3x-2.6x = 0.25 times 2
0.4x=0.5
x=5/4
x=1.25

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